10-Minute Speech Practice That Doesn't Require Sitting Still

Last updated 2026-07-09

What exactly is an AAC device button?

An AAC button is a single activatable cell on an augmentative and alternative communication device. Press it, and the device speaks the associated word or phrase aloud. That's the whole mechanism. Simple as that sounds, the design choices packed into each button, what symbol it shows, what word it speaks, where it sits on the grid, what color it carries, are what make or break communication for a child.

Buttons exist on dedicated speech-generating devices (SGDs), tablet-based AAC apps, and low-tech paper boards. A low-tech board uses the same button logic: a symbol in a cell that a person points to. High-tech versions just add the voice output. The American Speech-Language-Hearing Association (ASHA) defines SGDs as "electronic devices that produce spoken output" and notes they can be accessed by direct touch, eye gaze, a switch, or a head pointer ^[1].

Every button has at least three properties: a symbol or image, a spoken label, and a grid position. Some systems add a fourth, a color code tied to a grammar system like the Fitzgerald Key or an aided language color scheme. None of those properties is decoration. Each one changes how fast a communicator can find and fire the button under real pressure.

How many buttons does an AAC device need?

There's no single right number, and anyone who tells you otherwise is selling you something.

Research and clinical practice both point to a spectrum. Early communicators or people building motor patterns often start with 1 to 4 buttons to hold down cognitive load and build reliable motor hits. ASHA's guidance on AAC implementation says vocabulary size should match the communicator's current needs, not a developmental checklist ^[1]. The field has moved away from the "start with two buttons and earn more" philosophy because it delays access to functional language.

A widely cited principle from the work of Gail Van Tatenhove and other AAC researchers is that most communicators benefit from access to a core vocabulary of around 200 to 400 high-frequency words as early as possible, often spread across 60 to 120 button cells on a grid ^[2]. Core vocabulary (words like "want," "go," "stop," "more," "help") accounts for roughly 80% of words used in everyday conversation, even though it's a small number of distinct words ^[2].

Here's how button counts map to common device configurations:

The right number is whatever lets the person say most of what they want to say right now, with room to grow.

What are core vocabulary buttons and why do they get so much attention?

Core vocabulary buttons are the 200 to 400 words that do most of the work in everyday language. Words like "want," "no," "more," "help," "stop," "go," "I," "you," "that," "put." They're usually verbs, pronouns, prepositions, and descriptors rather than nouns.

The research behind core vocabulary is deep. A 1994 study by Marvin, Beukelman, and Bilyeu found that a small set of high-frequency words accounted for the large majority of words spoken across preschool settings ^[3]. Analyses of child language corpora show the same pattern: a tiny set of high-frequency words does an enormous amount of communicative work. This is why many speech-language pathologists (SLPs) get core words onto a device early, even before a child has many nouns.

Core buttons on most AAC systems stay in fixed positions across pages and folders. That consistency matters. When "want" is always in the top-left corner of every page, a child builds a motor memory for reaching it. Move the button, and you reset that motor learning. Consistency in core button placement is one of the few things the AAC field agrees on strongly ^[1].

Fringe vocabulary, the nouns and topic-specific words like "dinosaur" or "playground," gets added around the core. Fringe changes with context. Core stays put. A good AAC system keeps that distinction clean in its button layout.

How are AAC buttons organized on the device?

Organization falls into a few main philosophies, and your SLP will have opinions about which fits your child.

The most common is a grid layout with pages or folders. Core vocabulary lives on the home page. Folders branch off for topic-specific fringe words: food, school, feelings, people. Pressing "food" takes you to a page of food buttons. This works well for children who can learn folder navigation, but it adds cognitive steps.

Unified vocabulary systems like LAMP (Language Acquisition through Motor Planning) use a single-page layout where every word lives in a fixed, permanent spot from day one. LAMP draws on principles from childhood apraxia of speech treatment research and puts motor automaticity ahead of visual scanning ^[4]. The tradeoff is a dense home page, sometimes 84 to 144 buttons, which looks overwhelming at first but builds very fast motor access over time. You can read more about the motor-planning connection in our article on childhood apraxia of speech.

Scene-based displays take a different route. Instead of a grid of symbols, the communicator looks at a photograph of a real place (a classroom, a kitchen) with buttons embedded where objects appear. These work well for some early communicators and people who find symbol grids abstract. They're harder to generalize across new settings.

Some families working on the link between speech sounds and words want a tool that bridges AAC and speech practice. Little Words is built for that overlap, letting families practice vocabulary in structured, low-pressure sessions between therapy appointments. A quiz at littlewords.ai/start can help you figure out if it fits your child's current profile.

No organization system wins across the board. An SLP who specializes in AAC should trial at least two layouts with your child before committing to one.

What do the colors on AAC buttons mean?

Color coding on AAC buttons is a grammar hint, more than a design choice. Most systems use a version of the Fitzgerald Key, a color scheme first developed in 1929 for deaf education and later adapted for AAC. The standard mapping looks like this:

• Yellow: people and pronouns (I, you, he, she)
• Green: verbs and actions (go, eat, want, help)
• Blue: describing words (big, hot, happy)
• Orange or pink: nouns and things
• White: articles, prepositions, small connecting words
• Red: negatives and social words (no, stop, help)

The idea is that color gives a quick visual grammar scaffold. A child can watch a sentence take shape by the color pattern: yellow + green + orange = "I want food." Some research suggests color coding trims visual search time in dense grids, though the effect size is modest and individual differences are large ^[5].

Not every system uses Fitzgerald Key colors. LAMP Words for Life and some other motor-planning systems keep color coding minimal because they put position and motor memory ahead of visual features. Snap Core First and TouchChat use color coding prominently. There's no strong evidence that one color scheme beats another. Consistency within whatever system you pick is what matters most ^[1].

How does a child learn to use AAC buttons?

The main teaching strategy is called aided language stimulation, or "modeling." A communication partner, a parent, therapist, or teacher, touches the device buttons while speaking naturally. Say "let's go outside," and you also hit "go" and "outside" on the device. The child watches the buttons being used for real communication, more than as a drill.

ASHA and AAC researchers including David Beukelman and Pat Mirenda have written that modeling has to happen consistently across the day, more than during therapy sessions ^[1]. A child who sees button use modeled 20 to 30 times a day across natural moments will learn faster than a child who practices for 30 minutes in a clinic once a week.

Motor learning is a big part of button acquisition. Hitting the same button in the same spot repeatedly builds what researchers call a motor program. That's why position consistency matters so much. Once a child has a motor program for "want" in the top-left corner, they can fire it fast under communicative pressure without hunting for it.

Expectations matter here. Research consistently shows AAC does not suppress speech development, and in many cases supports it ^[6]. The American Academy of Pediatrics (AAP) endorses AAC as appropriate for children who cannot meet their communication needs through speech alone, and early introduction is supported even in toddlers ^[7]. For children on the autism spectrum, early AAC access is especially well-supported. Our article on autism spectrum speech therapy covers the wider therapy landscape.

Parents sometimes worry that giving a child a device will make them stop trying to talk. The evidence does not back that worry. The closest review found that AAC introduction either had no effect on speech or increased it ^[6].

What symbols are used on AAC buttons, and does symbol type matter?

Symbols on AAC buttons run from photographs to line drawings to text-only labels. The main commercial symbol libraries are PCS (Picture Communication Symbols, from Tobii Dynavox), SymbolStix (from n2y), Widgit, and ARASAAC (a free, open-source Spanish library). Each has its own visual style, from simple two-color line drawings to more detailed pictographic images.

Does symbol type matter? The research gives a careful answer. Studies on iconicity (how obviously a symbol represents its meaning) show it affects how fast new symbols are learned, but that advantage mostly applies to nouns and concrete verbs, not the abstract core vocabulary words that carry most of the communicative load ^[5]. Words like "want," "stop," or "more" are hard to picture in any symbol system. So for core vocabulary, motor learning and position probably outweigh symbol appearance.

For children who can read, text-only buttons are a legitimate option and remove the guesswork of symbol interpretation. Many full-featured AAC systems let you show both a symbol and text beneath it, which supports emerging literacy without dropping the visual cue for non-readers.

Photographs of real objects can work well for concrete fringe vocabulary, especially early on. Some autistic children respond more readily to photographs than to abstract line drawings, though this varies a lot by individual.

Can you customize AAC buttons yourself, or do you need an SLP?

You can customize buttons yourself on most modern AAC apps and devices. Adding a button, swapping a symbol, recording a custom voice label, these are all things parents and caregivers can and should learn. Waiting for an SLP appointment every time your child needs a new word creates a backlog that slows communication.

The overall architecture of the system, how folders are built, which core words live where, what access method to use, should involve a qualified SLP, ideally one with specific AAC training. ASHA maintains a searchable directory of certified SLPs at asha.org ^[1]. Many school districts are also required under IDEA (Individuals with Disabilities Education Act, 20 U.S.C. § 1400 et seq.) to provide AAC assessment and support as part of a child's individualized education program (IEP) if AAC is educationally necessary ^[8].

The customization split usually looks like this: the SLP handles system selection, initial layout, and access method. Families handle day-to-day additions, personalization (a button for the dog's name, the favorite snack, the best friend), and consistent modeling at home. That partnership is what makes AAC work in real life instead of just in the therapy room.

For families starting out, early intervention services (available from birth through age 3 under IDEA Part C) can include AAC assessment at no cost to families.

How much do AAC devices cost, and does insurance cover buttons and programming?

Device costs vary enormously. A dedicated SGD like a Tobii Dynavox I-Series or a Prentke Romich device runs roughly $6,000 to $12,000 before programming. Tablet-based AAC apps like Proloquo2Go ($249.99 as of 2024), TouchChat, or LAMP Words for Life ($299.99), plus a ruggedized tablet and case, bring the total to around $500 to $1,500 ^[9].

Insurance coverage runs on medical necessity criteria. Medicaid must cover medically necessary AAC devices for children under 21 under the EPSDT benefit, which is federal law ^[10]. Private insurance coverage varies by plan and state. Medicare covers SGDs under the durable medical equipment benefit (HCPCS codes E2500 through E2599). The funding process usually needs an SLP evaluation documenting that the device is medically necessary and that the person cannot meet communication needs through speech alone.

Programming the buttons, setting up vocabulary, organizing folders, is typically done by the SLP as part of the evaluation and fitting. Families sometimes pay out of pocket for programming updates if their insurance does not cover SLP visits for that purpose.

Low-tech communication boards, paper grids with printed symbols, are close to free once you have a printer. The Project Core free symbol sets (from the Center for Literacy and Disability Studies at UNC Chapel Hill) give research-based core vocabulary boards at no cost ^[11]. These are a legitimate starting point while funding for a high-tech device is being secured.

What happens when a child outgrows their AAC button setup?

Outgrowing a setup is a good problem to have. It means communication is expanding.

Watch for a few signs the layout needs updating: the child keeps asking for words that aren't programmed, reaching frequently used words takes too many steps, the child is spelling out words the grid doesn't have, or an SLP sees that motor patterns for current buttons are locked in and speed has plateaued.

Moving to larger grids or more complex folder structures needs care. Changing button positions for established vocabulary disrupts motor memory. The better practice is to expand by adding new buttons and folders rather than reshuffling existing ones. When a major layout change is unavoidable, plan for a re-learning period and crank up modeling frequency during that stretch.

For children moving toward more complex language, connecting AAC to literacy is worth thinking about early. Children who are also working on speech therapy goals around speech sound development can use AAC to communicate while those speech skills build. The two tracks support each other more than they compete.

Adolescents and adults sometimes want more socially typical communication tools, including text-based AAC or low-profile options. That preference deserves respect and should drive a re-assessment of the button system. Our broader AAC devices article covers the full range of device types if you're at a decision point.

What does the research say about which AAC button strategies actually work?

A few findings from the peer-reviewed literature are worth knowing because they cut through a lot of marketing noise.

Aided language stimulation (modeling) has the strongest evidence base for increasing AAC use and language development. A 2015 systematic review by Kent-Walsh, Murza, Malani, and Binger in the American Journal of Speech-Language Pathology found statistically significant positive effects of partner instruction across 23 studies, with effect sizes ranging from moderate to large ^[12]. The review's stated conclusion supports "the efficacy of AAC partner instruction" when partners are trained to model.

Starting vocabulary should include core words regardless of age or diagnosis. The evidence for this traces back to the frequency analyses mentioned earlier and has held up across multiple populations.

There is no credible evidence that any one symbol library, color scheme, or grid size produces better outcomes across all users. Individual assessment matters more than the product brand on the box.

The "wait until speech therapy fails" approach, delaying AAC until a child has been in speech therapy for years without progress, has no research support and contradicts ASHA's guidance, which calls for AAC consideration whenever a person cannot meet communication needs through speech ^[1].

What nobody has good data on yet: the ideal density of button grids for specific age groups, the long-term effects of different organizational systems on literacy, and how much modeling frequency is enough. Those are real gaps in the literature.

Frequently asked questions

How do I know which buttons to add to my child's AAC device first?

Start with the words your child most needs right now: requests, refusals, greetings, and a few high-frequency nouns from daily life. Core words like "want," "more," "stop," "go," and "help" come first because they work across nearly every situation. An SLP can run a vocabulary inventory by observing your child across settings and build a priority list grounded in real communication opportunities.

Should AAC buttons have pictures or text?

Both, ideally, once a child has any emerging literacy. Symbol plus text beneath it supports reading while keeping the visual cue for non-readers. For pre-readers, symbol-only buttons are standard. For children who can read, text-only buttons cut ambiguity, especially for abstract core words like "before" or "want" that are hard to picture. Your SLP can trial both formats and watch which produces faster, more accurate access.

Will using AAC buttons stop my child from developing speech?

No. Research consistently shows AAC does not suppress speech development and often supports it. A frequently cited review found AAC introduction either had no effect on natural speech or increased it across the populations studied. The American Academy of Pediatrics supports early AAC use for children who cannot meet communication needs through speech alone. Withholding AAC while waiting for speech has no evidence base.

How many buttons is too many for a young child?

There's no universal ceiling, but a 4x4 or 5x5 grid (16 to 25 buttons) is a common starting point for young children or beginning communicators. The real question is whether the child can access buttons accurately without frequent errors. If error rates are high and frustration is rising, reduce density. If a child moves through a small grid quickly and asks for words that aren't there, it's time to expand.

What is the difference between core and fringe vocabulary buttons?

Core vocabulary buttons are high-frequency words used across many contexts, mostly verbs, pronouns, and prepositions, like "want," "go," "I," "help." Research shows roughly 200 to 400 core words account for about 80% of everyday language. Fringe vocabulary buttons are topic-specific nouns and context words like "pizza" or "swimming." Core buttons stay in fixed positions; fringe buttons live in folders by topic.

Can I make my own AAC buttons at home without a device?

Yes. Low-tech communication boards with printed symbols are a legitimate, research-supported option. The Project Core program from UNC Chapel Hill offers free, downloadable core vocabulary boards designed by researchers. Print them on cardstock, laminate them, and you have a working communication board. This is also a good bridge while funding for a high-tech device is pending. Your SLP can advise on layout.

How are AAC buttons different from PECS?

PECS (Picture Exchange Communication System) is a specific behavioral protocol where a child physically hands a picture card to a partner to make a request. AAC buttons, whether on a device or a board, are pointed to or pressed in place without exchanging the item. PECS starts with exchange as the communication act; AAC systems aim for a wider range of communication functions from the beginning. Many SLPs use elements of both.

Do AAC buttons work for children with autism?

Yes, and the evidence is strong. Multiple systematic reviews support AAC, including SGDs and picture-based systems, for minimally verbal and non-speaking autistic children. ASHA endorses AAC as appropriate for autistic individuals who cannot meet communication needs through speech. Early introduction is supported. Some autistic children use AAC alongside speech as speech develops, reaching for buttons in complex or stressful moments when speech is harder to produce.

What is motor planning in AAC buttons and why does it matter?

Motor planning is the brain's ability to plan and sequence physical movements automatically. When a button always sits in the same spot, a communicator builds a motor memory for reaching it, the way a typist stops looking at the keyboard. That's why position consistency matters so much in AAC. Systems like LAMP (Language Acquisition through Motor Planning) are built around this principle and keep button positions fixed from the start.

How do I get insurance to pay for an AAC device and its programming?

You need an SLP evaluation documenting medical necessity, meaning the person cannot meet communication needs through speech alone. For children under 21 on Medicaid, EPSDT requires coverage of medically necessary devices. Private insurance varies by plan; many require prior authorization. Medicare covers SGDs under HCPCS codes E2500 through E2599. The SLP typically writes the letter of medical necessity and coordinates with the device manufacturer's funding team.

How often should AAC buttons and vocabulary be updated?

There's no fixed schedule. Update vocabulary whenever a child consistently asks for words that aren't programmed, or when an SLP sees that the current set is limiting communication. Many families do a vocabulary review every one to three months with their SLP. School-age children may need updates at the start of each school year to reflect new classroom topics, teachers, and peers.

What does aided language stimulation mean for parents using AAC buttons at home?

Aided language stimulation means you touch the device buttons while you talk, throughout the day, during normal activities. Say "want a snack?" and you also press "want" and "snack" on the device. You're modeling button use for real communication, more than drills. Research shows this is the most effective strategy for building AAC use, and it has to happen consistently across the day to work, more than during therapy.

Sources

1. ASHA, Augmentative and Alternative Communication (Practice Portal): ASHA defines SGDs, endorses AAC for individuals who cannot meet communication needs through speech, supports early introduction, and emphasizes vocabulary consistency and modeling.
2. Gail Van Tatenhove, Normal Language Development, Generative Language and AAC (ASHA Convention presentation, referenced via ASHA): Core vocabulary of roughly 200 to 400 high-frequency words accounts for approximately 80% of words used in everyday conversation.
3. Marvin, Beukelman, and Bilyeu (1994), Vocabulary-use patterns in preschool children, Augmentative and Alternative Communication: A small set of high-frequency words accounts for the large majority of words used in everyday conversation across settings.
4. ASHA, Childhood Apraxia of Speech (Practice Portal): LAMP and similar motor-planning AAC systems draw on principles from childhood apraxia of speech treatment research, prioritizing motor automaticity.
5. Schlosser and Sigafoos (2002), Augmentative and alternative communication interventions for persons with developmental disabilities, Journal of Autism and Developmental Disorders: Iconicity affects learning speed for concrete vocabulary but matters less for abstract core words; position and motor memory may outweigh symbol appearance for core vocabulary.
6. Millar, Light, and Schlosser (2006), The impact of augmentative and alternative communication intervention on the speech production of individuals with developmental disabilities, Journal of Speech, Language, and Hearing Research: AAC introduction either had no effect on natural speech production or increased it; there is no evidence AAC suppresses speech development.
7. American Academy of Pediatrics, Policy Statement on AAC (Council on Children with Disabilities): The AAP endorses AAC as appropriate for children who cannot meet communication needs through speech alone, including early introduction in toddlers.
8. Individuals with Disabilities Education Act, 20 U.S.C. § 1400 et seq.: IDEA requires school districts to provide AAC assessment and support as part of a child's IEP if AAC is educationally necessary; Part C covers early intervention from birth to age 3.
9. Tobii Dynavox and Prentke Romich Company, device pricing pages: Dedicated SGDs cost approximately $6,000 to $12,000; tablet-based AAC apps range from approximately $250 to $300 plus hardware costs.
10. Centers for Medicare and Medicaid Services, EPSDT benefit overview: Medicaid must cover medically necessary AAC devices for children under 21 under the EPSDT benefit, which is federal law.
11. Center for Literacy and Disability Studies, UNC Chapel Hill, Project Core: Project Core provides free, downloadable research-based core vocabulary communication boards for children who use AAC.
12. Kent-Walsh, Murza, Malani, and Binger (2015), Effects of communication partner instruction on the communication of individuals using AAC, American Journal of Speech-Language Pathology: A systematic review of 23 studies found statistically significant positive effects of aided language stimulation (partner modeling) on AAC use and language development, with moderate to large effect sizes.