
Choose a selection of 20 bricks; in different colors, shapes, and sizes.
Place them on the table in front of your child. Let the child study the bricks and tell them that you’re going to take some away.
Take one brick away. The child must then try to work out which bricks you’ve taken away. Get the child to describe the bricks that they believe are gone.
You can then reveal the ones you did take; they always find this a bit fun.