Where Did It Go? Deepening Object Permanence Through Play

You hide a toy under a cloth and, instead of forgetting it, your baby tugs the cloth away to find it. That small moment is a big deal. You might be wondering what has clicked in their thinking, and why peekaboo suddenly feels like the funniest game in the world.

What's happening this week

Around seven to eight months, babies are deep in the work of object permanence, the understanding that things and people still exist even when they cannot be seen. Earlier in infancy, out of sight really did mean out of mind. A toy that disappeared behind a blanket was simply gone. Now your baby is starting to hold a mental picture of an object even after it vanishes, and to search for it. You might see them look for a toy they dropped, lift a cup to find something hidden underneath, or lean to peek around a barrier.

This is also why peekaboo becomes so thrilling right now. Your face disappears, and your baby is just uncertain enough to feel suspense, then it reappears and the relief bursts into laughter. They are testing, over and over, that hidden things come back.

Why it matters

Object permanence is a cornerstone of memory and reasoning. It shows your baby is building the ability to represent things in their mind, hold them there, and act on that mental image, which is the seed of later thinking, planning, and imagination. It is also closely tied to emotional development. As your baby grasps that people continue to exist when they leave the room, they build the security that you will come back, even if the same understanding can bring a wave of separation anxiety around this age. Playing hide-and-find games gently and joyfully helps your baby practice this reassuring truth in a low-stakes way.

Simple ways to support it at home

Hide-and-find play is easy, free, and endlessly repeatable.

Play peekaboo often. Cover your face with your hands or a light scarf, then reveal with a happy Peekaboo. Vary it: hide behind a door, pop up from different spots, let your baby pull the cloth away themselves. The predictable delight is doing real cognitive work.

Hide toys partly, then fully. Start by covering a favorite toy with a cloth so a corner still shows, and let your baby uncover it. As they get the hang of it, hide it completely under a cup or scarf. A simple wooden ball or block works perfectly, and KizoPlay-style wooden shapes are satisfying to grasp when your baby finds them.

Try a ball-drop toy or cups. Toys where a ball disappears down a chute and rolls out the bottom, or nesting cups your baby can hide a small toy inside, make the vanish-and-return idea concrete and fun.

Narrate comings and goings. When you step out of view, call out cheerfully that you are still here and coming back. Hearing your voice while you are unseen reinforces that gone is not forever.

What's normal, and when to check in

Object permanence develops gradually over many months, usually strengthening from around eight months into the toddler years, so do not expect a single switch to flip. Some babies search eagerly for hidden toys early, others take more time, and both are normal. A little separation anxiety appearing alongside this stage is expected and healthy, a sign your baby knows and prefers their special people.

Talk with your pediatrician if, over the coming months, your baby shows little interest in the people or objects around them, does not respond to their name or familiar voices, or is not engaging in back-and-forth games like peekaboo by around nine to ten months. These are gentle checkpoints, and your doctor can reassure you.

Every giggling round of peekaboo is your baby learning that the world, and you, can be trusted to come back. Enjoy the game.