Cut the potato in half. On the slice cut out some geometrical figure, star, cross, circle or even man. Maybe the kid will come up with something interesting. In shallow trays dilute the paint of different colors. Prepare the paper. Now, show the child how to make prints on paper, dipping the stamp into the paint and applying it to the paper. Let the kid give free rein to the imagination. Maybe he will get the ornament may, domestic scene, and possibly painting cubist!