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Sorting by Size

👶 9–11 months Cognitive

Offer your baby objects of different sizes to sort into big and small groups.

In the Little Play app, this activity appears in week 41 of your baby's personalized plan.

Sorting by Size, a baby activity for 9–11 months

How to play

1
Gather 4-6 objects in two clearly different sizes (big balls, small balls).
2
Show your baby the big one and the small one.
3
See if they can put big ones in one bowl and small ones in another.

What you need

• Objects in two sizes, two bowls

Simple household items. No plastic toys needed.

Why it works

Sorting by size is an early math concept that builds categorization skills and spatial understanding.

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Little Play picks a daily plan matched to your baby's exact week, plus bedtime stories and plastic-free toy guidance. Free on iOS.

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