The best time to start baby sign language is between 6 and 8 months old, when babies begin maintaining eye contact and showing clear interest in communication. At this age, you can start modeling simple signs alongside spoken words—for example, signing “milk” while saying “milk” at feeding time. Most babies won’t sign back immediately, but many will begin making intentional hand gestures and controlled movements by 9 to 12 months.
The earlier you introduce signs, the earlier your child gains another tool to express their needs and thoughts. This article walks you through everything you need to know about starting baby sign language: the ideal starting ages, what development milestones to expect, the real research on language benefits, and practical strategies for teaching your baby their first signs. Whether you’re interested in baby sign language as a bridge to spoken language, a way to reduce toddler frustration, or simply giving your child an additional communication skill, this guide covers the foundations of getting started.
Table of Contents
- What Age Should You Start Teaching Baby Sign Language?
- The Real Benefits and Limitations of Baby Sign Language
- Which Signs Should You Teach First?
- Building Consistency Into Your Daily Routine
- Common Concerns: Will Sign Language Delay My Baby’s Speech?
- Resources for Learning Baby Sign Language
- Moving Beyond First Signs: What Comes Next
- Conclusion
What Age Should You Start Teaching Baby Sign Language?
You can begin introducing sign language to your baby as early as birth if you wish, but the most effective window is when your baby reaches 6 to 8 months old. This is the age when babies consistently maintain eye contact and demonstrate genuine interest in watching your mouth, hands, and facial expressions. Before 6 months, some babies will recognize signs as early as 4 to 6 months, but signing back typically doesn’t happen until closer to 9 to 12 months. Starting too early, before your baby shows readiness signals, may feel frustrating since you won’t see obvious results. The developmental timeline for sign language follows a clear progression. Most babies produce their first sign around 8.5 months on average.
By 13 months, they typically can produce about ten different signs. By 17 months, they’re often making simple two-sign combinations and beginning to use pronouns like “me.” By age 2, many children who learn to sign are producing two-word phrases. However, if your baby doesn’t hit these milestones exactly on schedule, it doesn’t mean something is wrong—development varies widely, and some children are naturally quieter communicators. One important distinction: starting early with sign language doesn’t guarantee your baby will be a fluent signer by age 2. Native sign language learners (children of deaf parents who sign exclusively from birth) follow these milestones. If you’re using sign language alongside spoken English, development may be different. Your baby will likely be bilingual or exposed to sign as a complementary communication tool rather than a primary language, which is perfectly valid and often the goal for hearing families.
The Real Benefits and Limitations of Baby Sign Language
Research shows that baby sign language does reduce frustration and tantrums, particularly around ages 12 to 24 months when babies understand more than they can say. A baby who can sign “more,” “all done,” “help,” or “hurt” has a direct way to communicate their needs rather than resorting to crying or screaming. parents consistently report that learning to sign with their babies deepens the parent-child bond and creates richer early interactions. The ability to understand what your baby wants before they become upset is genuinely valuable, regardless of what long-term research says about language development. However, a 2026 peer-reviewed study found that baby sign language shows weak to no measurable effect on vocabulary development or caregiver behavior after controlling for socioeconomic status and parent-child interaction. This doesn’t mean sign language is useless—it means the relationship between “using baby sign language” and “having a bigger vocabulary” is more complicated than marketing claims suggest.
Parents who sign with their babies tend to be more engaged communicators overall, and that engagement is what drives language development, not the signing itself. This is an important distinction: baby sign language is a tool for clearer communication right now, not a shortcut to a smarter child later. One major concern parents have is whether learning sign language will delay spoken language development. Research indicates the opposite: there is no conclusive evidence that baby sign language delays speech, and some research suggests that children who learn to sign may actually speak earlier. The brain appears to treat sign language and spoken language as parallel communication systems that develop on the same timeline. If anything, having two ways to communicate early may reinforce language concepts generally, though the evidence here is mixed. The key is consistency: use signs alongside spoken words every single time, so your baby associates the sign with the spoken word.
Which Signs Should You Teach First?
Start with functional, high-frequency signs that your baby sees repeatedly throughout the day. The most commonly taught first signs are “milk” (or “bottle”), “more,” “all done” (or “finished”), “mommy,” “daddy,” and “help.” These signs matter to your baby’s daily life, unlike abstract signs like “butterfly” or “elephant,” which are interesting but rarely needed in the moment. When you sign “milk” at every feeding while saying “milk,” your baby makes the connection between the sign, the word, and the experience. This repetition is what builds recognition and, eventually, imitation. Introduce new signs gradually—perhaps one or two per week—rather than overwhelming your baby with ten signs at once. Early success with a few well-practiced signs builds momentum. Your baby is more likely to attempt a sign they see consistently than one they’ve only seen once or twice.
If you have access to videos or classes on baby sign language basics, start with the most common first signs taught in those programs. There is no secret “best” sign to start with; it’s the consistency and repetition that matter most. A common limitation is that parents often teach signs they think are cute or fun without considering whether the baby has a reason to use them. A baby has little motivation to sign “tree” on a daily basis, even if it’s a delightful sign to watch. Focus on signs connected to your baby’s immediate needs and routines: eating, changing, playing, sleeping. Once your baby successfully uses a few functional signs, then you can gradually expand to more exploratory signs related to their growing interests. This practical-first approach tends to maintain momentum and keeps both parent and baby engaged.
Building Consistency Into Your Daily Routine
Consistency is the single most important factor in teaching baby sign language, more important than choosing perfect signs or finding the best videos. You need to use the same sign the same way every time that situation arises—signing “milk” at breakfast, lunch, snack, and bedtime, alongside the spoken word. If you sign “milk” sometimes but forget other times, your baby has no reliable pattern to learn from. This doesn’t require special classes or flashcards; it means incorporating signs into moments that naturally happen anyway. The most successful approach is to pick 3 to 5 core signs and commit to using them consistently for at least 2 to 4 weeks before introducing new ones. This might mean setting a small reminder on your phone during mealtimes or putting a sticky note on the refrigerator. If you have a partner or regular caregiver, make sure they’re using the same signs the same way.
Inconsistency between parents confuses rather than helps a baby learning to recognize patterns. You don’t need special materials or a formal lesson plan; you just need to decide on a sign and stick with it. One tradeoff to consider: if you’re learning sign language primarily to communicate better with your baby right now, focus on this practical consistency. If you’re interested in your baby becoming fluent in American Sign Language (ASL), you’ll eventually need more formal instruction, possibly from a deaf ASL teacher. These are two different goals. Many families successfully use baby sign language functionally—teaching the core 20 to 30 signs—without ever learning ASL deeply. That’s a valid choice. However, if your goal is true ASL fluency, the timeline and resources shift significantly.
Common Concerns: Will Sign Language Delay My Baby’s Speech?
This is the question that stops many parents from trying baby sign language, so it deserves a direct answer. No—there is no conclusive research showing that baby sign language delays spoken language development. In fact, bilingual babies (those exposed to two spoken languages or a sign language and a spoken language) may go through a period where they produce slightly fewer words initially while they process two language systems, but they eventually catch up and may have cognitive advantages. The brain handles sign language and spoken language in overlapping areas and follows similar developmental timelines. Some studies suggest that children who learn to sign alongside spoken language may actually have earlier speech development than monolingual children, possibly because they’re exposed to more language input overall and have already mastered certain linguistic concepts through signs.
Whether your baby signs or not, the most important predictor of language development is how much language they hear and how much interactive back-and-forth communication they experience with caregivers. A parent who signs “milk” while saying “milk” and watching their baby’s response is engaging in rich language interaction, which benefits both systems. The research on sign language and speech is clear enough that deaf parents raising hearing children confidently teach ASL from birth while the children also learn spoken language from school and peers—and these children typically develop normally in both languages. If you’re learning baby sign language from instructional videos and using it at home while your baby is also exposed to spoken language, you’re in an even less intensive context than true bilingualism, which makes the concern about speech delay even less valid. Use the signs, speak the words, and trust the research.
Resources for Learning Baby Sign Language
You don’t need specialized training to learn basic baby sign language. Online resources like YouTube, parenting websites, and baby sign language apps can teach you the most common first signs. The advantage of video instruction is that you can see the hand shapes, positions, and movements clearly and rewind to practice. Look for resources specifically labeled “baby sign language” rather than general ASL instruction, since baby sign often focuses on functional signs and simplified versions rather than complete grammatical ASL.
If you want more structure or connection with other families, some communities offer baby sign language classes through libraries, early intervention programs, or parent education centers. These classes provide instruction, accountability, and community—benefits you won’t get from a free YouTube video. However, a class is not necessary. Thousands of families successfully teach baby sign language using videos and books alone. The key is choosing a resource and committing to regular practice rather than jumping between many different sources.
Moving Beyond First Signs: What Comes Next
Once your baby is signing consistently and you’re both comfortable with 5 to 10 core signs, you have choices about where to go next. Some families naturally expand to more signs, teaching new concepts as their child shows interest. Others stay with functional basics and let spoken language take the lead as the child gets older. There’s no “right” answer—your baby will develop language either way. Some families who fall in love with signing eventually pursue formal ASL instruction for the whole family, discovering a rich language and community they didn’t expect.
Others use baby sign as a communication bridge during the pre-verbal months and gradually phase it out as spoken language becomes dominant. The long-term research on bilingual development suggests that early exposure to sign language doesn’t harm later skills in any language. If you decide sign language isn’t for your family, you can stop and your baby will be fine. If you decide to continue, you can pursue it as deeply as you wish. The flexibility to try, adjust, and change direction is one of the real benefits of starting baby sign language at home rather than committing to a specific long-term curriculum.
Conclusion
Starting baby sign language is most effective between 6 and 8 months old, using simple functional signs paired with spoken words. Consistency matters far more than choosing perfect signs or finding the fanciest resources. Your baby can recognize signs as early as 4 to 6 months and produce their first sign around 8.5 months on average. The real benefits are communication clarity right now—reducing frustration, deepening your connection—not guaranteed language superpowers later.
To get started, choose 3 to 5 functional signs related to daily routines like feeding and changing, use them consistently every time that situation happens, and keep them paired with spoken words. Watch for your baby’s readiness signals and remember that development varies widely. You don’t need special training, expensive classes, or materials—just commitment to consistency. Whether you eventually pursue deeper sign language learning or treat it as a temporary communication bridge, you’re giving your baby an earlier way to tell you what they need.