Make a puzzle by cutting cardboard into two 20 cm (8 inches) square pieces.

Paste a colorful magazine illustration on one and cut it into various geometric forms.

Write any number problem on the back of each piece.

Write the answers to the problems on the other cardboard square in the general areas where the pieces fit.

Ask the children to place the pieces in the general "answer areas" to perfectly restore the picture.

PS: Consider doing more fun printable math activities.