object permanence
When should a child develop object permanence?
Object permanence — understanding that things exist even when out of sight — emerges around 8 months and is usually well established by 12–18 months. Most babies find a fully hidden toy by their first birthday and love peek-a-boo. A gentle developmental check is worthwhile if there's no interest in finding hidden objects by 15–18 months.
That moment your baby hunts for a toy you've hidden under a cloth — that's a quiet milestone of thinking, not just play.
In short
Object permanence — knowing that things still exist even when they're out of sight — begins to emerge around 8 months and is usually well established by 12–18 months. Most toddlers can find a fully hidden object by their first birthday, and enjoy peek-a-boo and hide-and-find games soon after. It's a normal, gradual unfolding, so a few weeks either way is perfectly typical.How it unfolds
- 6–8 months — your baby starts to look for a partly hidden toy, or for one they just dropped.
- 8–12 months — they search for a fully hidden object, and love peek-a-boo because they now expect your face to return.
- 12–18 months — they remember where something was hidden even after a short delay, and may search in more than one place.
Object permanence is a foundation for memory, problem-solving and later language — it's how a child learns that words and people are real even when not in view.
The science
This skill reflects developing working memory and the understanding that the world is stable and predictable. It's why a baby who once forgot a hidden toy will, months later, lift the cloth with confidence.When to gently check in
If by around 15–18 months your toddler shows no interest in finding hidden objects, doesn't enjoy peek-a-boo style games, or this sits alongside other concerns about play, gestures or words, a friendly developmental check is worthwhile — early and reassuring, never alarming.The Pinnacle way
A clinical AbilityScore® and any diagnosis are formed only at a Pinnacle Blooms Network centre under qualified clinician care — never from a web page. We can map your child's cognitive and play milestones and, where helpful, support them through occupational therapy.Trusted sources
Guided by CDC developmental milestone guidance and AAP/HealthyChildren resources on infant and toddler cognitive development.Next step — if you'd like reassurance or a simple developmental check, message our team on WhatsApp at +91 91001 81181 to book a screen.
This is general information, not a diagnosis — a clinical AbilityScore® and any diagnosis are formed only at a Pinnacle Blooms Network centre under qualified clinician care.
What to watch
Gently check in if by 15–18 months your toddler shows no interest in finding hidden objects, doesn't enjoy peek-a-boo, or this sits alongside other concerns about play, gestures or words.
Try this at home
Play peek-a-boo and hide a favourite toy under a cloth while your baby watches — then encourage them to find it. Smiles and searching are the milestone in action.
Trusted sources
Developed by SETU Consortium · Pinnacle Blooms Network · Last reviewed 2026-06-10 · reviewed every 540 days
This is general information, not a diagnosis. A clinical AbilityScore® and any diagnosis are formed only at a Pinnacle Blooms Network centre, under qualified clinician care.
Frequently asked
At what age do babies develop object permanence?
It begins to emerge around 8 months and is usually well established by 12–18 months. Most babies can find a fully hidden object by their first birthday.
Why do babies love peek-a-boo?
Once object permanence develops, your baby expects your hidden face to return — so the reappearance is delightful and predictable, which is exactly why the game is such fun.
When should I be concerned about object permanence?
A gentle developmental check is worthwhile if by around 15–18 months your toddler shows no interest in finding hidden objects, especially if it sits alongside other play, gesture or language concerns. It's reassuring, never alarming.