When Your Baby Starts Sitting Up — Why Peek-A-Boo Is the Perfect Game

How the Classic Game Supports Object Permanence, Taking Turns & Social Sound Play for Your Newly-Sitting Baby

When Do Babies Start Sitting Up?

Most babies start sitting up with support around 6 months and sit independently by 9 months, according to the CDC. When your baby sits up, they gain a whole new perspective on the world—and peek-a-boo becomes the perfect way to celebrate this milestone while building important developmental skills.

When your baby starts sitting up, the world suddenly opens in a whole new way. They can see more, reach more, and engage more. According to the CDC, by around 6 months, many babies can lean on their hands to support themselves when sitting. By about 9 months, most babies “get to a sitting position by herself” and “sit without support.” This milestone isn’t just about balance and strength; it’s a doorway into learning, laughter, and connection.

And one of the best ways to build on this exciting stage? Play peek-a-boo.

Baby getting ready to play peekaboo.

Why Peek-A-Boo Is Perfect When Baby Starts Sitting Up

Peek-a-boo isn’t just adorable; it’s a powerful developmental game. Every time you hide your face and reappear, your baby learns the concept of object permanence—that people and things still exist, even when they can’t see them. The CDC lists “Smiles or laughs when you play peek-a-boo” as a typical milestone around 9 months. That “Boo!” moment when your face reappears? It’s a tiny explosion of trust, surprise, and joy all wrapped together. Your baby’s giggles show that they’re beginning to understand, “Mommy didn’t disappear...she always comes back.” This kind of baby social play helps lay the foundation for emotional security, turn-taking, and even early communication. Those joyful squeals and sounds your baby makes? That’s the start of conversation!

How to Play Peek-A-Boo with a Sitting Baby

If your baby is still learning how to sit, you can play peek-a-boo while supporting them in your lap or on the floor between your legs. Once you notice they’re leaning or starting to sit up (e.g., by about 6 months) and especially once they sit without support (closer to around 9 months), you can step it up! Here’s how:

1. Start simple: Cover your face with your hands and say, “Where’s Mama?” Then reveal your face with a big smile and say, “Peek-a-boo!”

2. Use a cloth: If baby isn’t yet reaching to cover their own face (which is typical early on), use a burp cloth or soft dishtowel. Hide your face under it, then pull it away dramatically.

3. Encourage imitation: Once your baby starts smiling and anticipating the “boo,” invite them to pull the cloth off your face. This builds imitation, fine-motor control, and early social communication.

4. Change it up: Try placing the cloth gently over your baby’s head or just over one eye. Watch how they explore and react. This helps them experience new sensations while feeling safe.

Baby Sitting Up Timeline:

What to Expect According to the CDC, here's when babies typically start sitting up:

• Around 6 months: Many babies can lean on their hands to support themselves when sitting

• By 9 months: Most babies can "get to a sitting position by herself" and "sit without support"

Every baby develops at their own pace. If your baby isn't sitting up by 9 months, talk with your pediatrician.

What If My Baby Doesn’t Enjoy Peek-A-Boo Yet?

Not all babies love surprise games right away—and that’s okay! If your baby looks uncertain or turns away, don’t push it. Instead, model joy and playfulness by playing peek-a-boo with someone else nearby. Your baby will watch, learn, and eventually join in when they’re ready. Sometimes simply seeing others laugh and connect is enough to help them warm up to the game later.

Why Peek-A-Boo Supports More Than Just Smiles

Playing peek-a-boo when your baby starts sitting up combines movement, sensory input, and communication—while also helping strengthen the core muscles needed for baby sitting up independently. Each round strengthens:

• Core strength and posture — as baby sits upright and balances.

• Visual tracking — as they follow your moving hands or the cloth.

• Turn-taking and imitation — early social-communication foundations.

• Emotional confidence — the realization that separation isn’t forever (object permanence!).

  
  

This one simple game we’ve played for generations builds both brains and bonds.

Celebrate Every “Boo!”

When your baby starts sitting up, peek-a-boo becomes more than a game—it becomes a shared moment of discovery and connection. Every giggle means your little one is growing in strength, understanding, and joy. So grab that burp cloth, get ready to smile, and enjoy your daily dose of peek-a-boo magic.

💡 Key Takeaway

Peek-a-boo for babies strengthens object permanence, encourages turn-taking, and supports both motor and communication milestones—all while filling your day with laughter. Because sometimes, the simplest games are the most powerful tools for development.

The Importance of Play in Early Development

Play is essential for your baby’s growth. It’s not just about fun; it’s about learning. Through play, your baby explores their environment, develops motor skills, and begins to understand social interactions. Each game, like peek-a-boo, is a stepping stone towards more complex skills.

Encouraging Exploration and Curiosity

As your baby becomes more mobile, encourage them to explore their surroundings. Create a safe space where they can crawl, reach, and discover new things. This exploration is vital for their cognitive and physical development.

Building Emotional Connections

Every interaction you have with your baby strengthens your bond. When you play together, you’re not just having fun; you’re building trust and emotional security. Your baby learns that they can rely on you, which is crucial for their overall development.

Understanding Developmental Milestones

It’s important to be aware of developmental milestones. These milestones give you a roadmap of what to expect as your baby grows. However, every child is unique. If your baby doesn’t meet a milestone at the expected time, it’s okay. Celebrate their individual journey!

Seeking Support and Resources

If you ever feel overwhelmed or unsure, remember that you’re not alone. There are many resources available to help you navigate your parenting journey. Whether it’s books, online communities, or professional guidance, seeking support is a sign of strength.

Feeling Overwhelmed? Needing Support? You’re Not Alone

We believe parents should feel empowered, not overwhelmed. If you’ve got questions or want to learn more:

• Leave a comment—we’d love to hear from you!

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• Listen to our Walkin’ The Talk Podcast on iTunes or Spotify.

  
  

And remember, early support isn’t just intervention—it’s *prevention*, empowerment, and connection. And it’s never too early to be curious, ask questions, and seek guidance. We’re here for you, every step of the way. 🍼👣✨

With heart,

The NewDay Child Coaching Team

Rachel Lynn, SLP: Communication and Swallowing/Feeding Guide 🩷

Dr. Amber Michelle, PT: Physical Development Guide 💚

Amanda Rae, OT: Fine Motor, Sensorimotor, Sensory/Feeding Guide 💛

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