Object Permanence in Babies: When It Develops | Parenting Hub
Object permanence — knowing things still exist when out of sight — develops between 6–9 months. It explains peekaboo, dropped spoons and separation anxiety.
When a baby learns that things still exist when they can't see them, a whole world opens up — and so do peekaboo games, dropped-spoon experiments, and separation anxiety.
What it is
Object permanence is the understanding that something still exists even when it's out of sight. Before this develops, 'out of sight' really does mean 'gone' for baby. It builds gradually between about 4 and 12 months.
Typical timing
- 4–6 months: looks briefly for partly hidden objects
- 6–8 months: searches for fully hidden objects
- 8–12 months: understands you still exist when you leave the room
- 12–18 months: can find objects moved between hiding places
Why peekaboo and dropping things are 'work'
Peekaboo is a science experiment — does Mum reappear every time? Dropping the spoon over and over is the same: gravity, sound, and 'will it come back?' It's exhausting but it's exactly how cognitive development happens.
Why separation anxiety arrives now
Separation anxiety often peaks between 8 and 18 months — right when object permanence is solid but baby doesn't yet trust that you'll come back. Predictable goodbyes and consistent reunions help build that trust.
When to seek help
- No interest in searching for hidden objects by 12 months
- No response when you leave or return by 12 months
- Loss of skills previously gained
Common questions
Should I sneak out when leaving so my baby doesn't cry?
No — predictable goodbyes are better. A short, calm 'bye, see you after sleep' and consistent return helps baby learn you always come back.
How long should I keep picking up the dropped spoon?
Until you've had enough. It's developmentally important play, but you're allowed to switch to a suction bowl or move on.