Cut out colored paper squares of different colors and different sizes. Now play with the baby. Lay the squares "growth": from small to large (small square ate well and grew big, from big to small. Then stir and ask your child to arrange them in the desired sequence. Ask them to choose the largest square is the smallest. Show your child how large square can be less close, but a little large you cannot close. How to put colored squares on one another, to see them all? When you and your baby get it, glue the squares on a sheet of white paper in the desired sequence. Fold the remaining cut pieces in a large envelope - you will need them later.