The Box Game

11-1 • 11:00 am - 12:30 pm • Montgomery County

Kensington Park Library, 4201 Knowles Ave, Kensington, MD 20895


Adults could start by using three large toys and a giant box with a group of young children. Then use bigger numbers or miniature toys with smaller groups or individuals.
Encouraging mathematical thinking and reasoning:
How many are there to start?
How many now?
How do you know?
How did you work it out?
Created by NRICH (
The Activity
Put toys one at a time into the box, so children cannot see them inside, counting altogether.
Ask: ‘Can you show on your fingers how many are hidden?’. Display a large numeral.
Add one to the box, without showing the objects inside and ask children to show on their
fingers, ‘How many are there now?’ Then show how many are inside the box and count to
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