Baby sign language words are manual gestures and hand movements that represent specific concepts, allowing infants and toddlers to communicate needs, feelings, and observations before they can speak. The most commonly learned first sign is “more,” where babies tap their fingertips together—a simple gesture that captures one of their most frequent desires. Beyond “more,” early vocabulary typically includes signs for milk, drink, eat, play, and all done, with research suggesting that introducing around 10-11 starter signs gives babies a strong foundation before expanding to more complex vocabulary.
This article explores which words babies learn first, when they typically master these signs, how sign language affects their overall language development, and what the latest research says about both the benefits and the concerns parents often have. Learning baby sign language opens a communication channel months before babies can form intelligible spoken words, reducing frustration on both sides and creating a richer understanding between parent and child. Understanding the specific words that babies learn first—and the developmental timeline they follow—helps parents set realistic expectations and choose which signs to prioritize when teaching.
Table of Contents
- What Are the Most Common First Baby Sign Language Words?
- When Do Babies Learn to Sign and How Quickly Does Vocabulary Grow?
- How Does Baby Sign Language Compare to Spoken-Only Language Development?
- What Does Research Say About the Benefits of Baby Sign Language?
- Will Baby Sign Language Delay My Child’s Spoken Language Development?
- How Many Signs Should You Teach and What Resources Are Available?
- How Baby Sign Language Fits Into Overall Communication Development
- Conclusion
What Are the Most Common First Baby Sign Language Words?
The first words babies learn to sign follow a predictable pattern that reflects their immediate, daily needs. “More” consistently ranks as the most frequent first sign, likely because the concept of “more” is relevant to many activities—more milk, more play, more food. Other early foundational signs that appear across research and parenting guides include “milk,” “drink,” “eat,” “play,” and “all done.” These six to ten signs form a starter vocabulary because they directly address the core activities of an infant’s day and give babies agency in communicating what they want.
The beauty of starting with these high-frequency words is that they appear in context multiple times throughout the day. Every feeding is an opportunity to sign “milk” or “drink.” Every mealtime presents occasions to use “eat.” This repetition and real-world relevance make these early signs stick faster than more abstract concepts would. parents often report that once a baby masters these foundational signs, learning additional words becomes easier and faster.
When Do Babies Learn to Sign and How Quickly Does Vocabulary Grow?
Children of deaf parents who grow up with sign language as their native language produce their first recognizable sign at a mean age of 8.5 months, with the earliest instances occurring at around 5.5 months. For hearing babies introduced to baby sign language, the timeline is slightly more gradual—most begin signing back intentionally around 6 to 9 months when they develop the motor control and understanding to make deliberate gestures. This is earlier than most children speak their first intelligible word, which typically occurs between 12 and 18 months.
The vocabulary growth that follows is remarkably rapid. One documented case showed a child with 126 words in their sign vocabulary by age 2 years old. More striking still, native signing children aged 12 to 17 months demonstrated median vocabulary sizes that exceeded those of English-speaking children of the same age. This difference suggests that sign language, when consistently introduced, may actually accelerate early communication ability and vocabulary expansion compared to children learning only spoken language.
How Does Baby Sign Language Compare to Spoken-Only Language Development?
Research from 2026 examining the effects of baby sign language on vocabulary development revealed something nuanced and important: while baby sign language doesn’t enhance spoken vocabulary development, it dramatically empowers babies to communicate their needs before verbal ability emerges. That distinction matters because it reframes what baby sign language actually does—it’s not a shortcut to speaking faster, but rather a way to bridge the gap between cognitive readiness and physical speech capability. Children taught baby sign language develop larger vocabularies and longer sentences by age 2 compared to non-exposed peers.
Additionally, a 2025 study found that baby sign language boosts early literacy skills including letter recognition and phonemic awareness. This connection between manual communication and literacy suggests that the motor and cognitive engagement required for signing may prepare the brain differently than spoken language alone. However, if your goal is specifically to accelerate spoken language development in a hearing child with no deaf family members, introducing baby sign won’t speed that up—though the research shows it won’t delay it either.
What Does Research Say About the Benefits of Baby Sign Language?
The most immediate and observable benefit is behavioral: parents report reduced stress and fewer tantrums. Babies who can sign are able to communicate frustration, hunger, or desire for play before they reach the breaking point of crying or aggression. This reduction in communication-based frustration creates a calmer household and allows parents to feel they have a genuine understanding of their baby’s needs. The American Academy of Pediatrics has approved simple sign language for use with infants and toddlers, which carries significant weight in medical recommendation.
Beyond the behavioral benefits, research shows educational and developmental gains. The 2025 study on early literacy demonstrates that exposure to baby sign language strengthens foundation skills that directly support reading development. There is also strong reassurance from decades of research that baby signing causes no delays in language development—a concern many parents voice. In fact, bilingual children who grow up with both sign and spoken language show normal, healthy language development in both modalities. The evidence consistently shows that adding sign language to a child’s communication toolkit is purely additive, with no negative tradeoffs.
Will Baby Sign Language Delay My Child’s Spoken Language Development?
This is perhaps the most common concern parents express, and the research is clear: no. Extensive studies of deaf children of hearing parents, hearing children of deaf parents, and children deliberately exposed to baby sign language all show that sign language does not create speech delays. Bilingualism—whether involving two spoken languages or a spoken and signed language—actually shows benefits for cognitive flexibility and language processing. Children naturally compartmentalize which language is appropriate in which context.
There is one important caveat: the absence of consistent spoken language models will impact spoken language development. If a baby is exposed to baby sign but has minimal interaction with speech or speakers, spoken language will develop more slowly. But this isn’t a problem with sign language itself—it’s the absence of speech input. The ideal scenario is consistent exposure to both sign and spoken language, which is what most hearing families using baby sign language naturally provide. You don’t need to choose between sign and speech; you can offer both.
How Many Signs Should You Teach and What Resources Are Available?
Starting with 10-11 starter signs is the consensus recommendation, which prevents overwhelming both parent and child while maximizing the usefulness of the vocabulary. Once that foundation is solid and the whole family is comfortable signing, expanding becomes natural and intuitive. The Baby Sign Language Dictionary contains over 600 common signs, serving as a reference for parents who want to continue growing their vocabulary beyond the basics.
This resource level ensures that whether you use baby sign language for the first year or continue for years, you’ll have support. The practical approach is to begin with the foundational words, practice them consistently in context, and add new signs only when the existing ones feel natural and automatic. Many parents use online videos and apps alongside physical dictionaries, though direct instruction and practice with caregivers remains the most effective method because babies learn through repeated real-world exposure.
How Baby Sign Language Fits Into Overall Communication Development
Baby sign language isn’t a separate language track—it’s a bridge that fills the communication gap between a baby’s cognitive sophistication and their physical ability to produce speech. As children grow and spoken language develops, sign language use often decreases naturally (though many families choose to continue it). The developmental advantage—reduced tantrums, stronger early literacy, larger vocabulary—establishes a foundation that supports ongoing language learning.
Looking forward, more research will likely continue exploring the literacy and cognitive benefits of early sign language exposure. The current evidence suggests that the decision to teach baby sign language isn’t a either-or proposition but rather an opportunity to build stronger early communication, reduce household frustration, and establish skills that support reading and cognitive development. As more parents and pediatricians become aware of the research backing baby sign language, it’s shifting from a niche option to a mainstream recommendation.
Conclusion
Baby sign language words begin with practical, high-frequency signs like “more,” “milk,” “eat,” “drink,” and “play,” with most babies learning to sign back between 6 and 9 months. The developmental benefits are well-established: reduced tantrums, larger vocabularies by age 2, stronger early literacy skills, and no delays in spoken language development. Starting with 10-11 foundational signs and using resources like the Baby Sign Language Dictionary creates a sustainable introduction that parents can learn alongside their children.
If you’re considering baby sign language for your family, the research gives you clear permission to move forward without worry about side effects or delays. The most important factor isn’t which specific signs you choose but that you practice them consistently in real-world contexts—during meals, play, transitions, and daily routines. This consistency is what transforms a hand gesture into a meaningful communication tool that your baby can actually use.