Kids usually start enjoying peek-a-boo around 3 to 6 months old , and it often becomes a favorite once they’re closer to 6 to 9 months. At that stage, they’re better at following faces and beginning to understand that people still exist even when hidden.

Typical ages

  • 0 to 3 months: Babies may just watch, focus on your face, or coo a little.
  • 3 to 6 months: They start tracking movement better and may smile or laugh.
  • 6 to 9 months: Peek-a-boo often gets the biggest reaction because object permanence is developing.
  • 9 to 12 months: Some babies begin to copy the game or make their own “boo” sounds.

What matters most

There isn’t one perfect age, because babies develop at different speeds. Peek- a-boo can be played very early, but it becomes more interactive as a child’s vision, memory, and social response improve.

Simple rule of thumb

If a baby can focus on your face and seems interested in your expressions, peek-a-boo is usually a fun, age-appropriate game already. The biggest “aha” moment often comes when they start expecting you to reappear.

TL;DR: Start as early as a few months old, but most kids really get peek-a-boo around 6 months or so.