Let it dry completely. Next, paint the alphabet or numbers on the magnets with a light color, preferably white. I have also painted a gameboard in the baking pan and made the magnets the game pieces. Just paint smiley faces for the game pieces and make them different colors. Stamp them on a piece of paper, washing off the apple between colors.
Potatoes make great stamps, too.
Carve away what you DON'T want paint on, so the other part is raised. Start with a heart. Keep the heart and cut away the surrounding potato. It goes without saying that the carving should be done by the adult, not the child, and put the knife away immediately. Brown lunch bags Great for painting on puppet faces, collecting things from the neighborhood walks, decorating and sending to relatives with letters, poetry, math facts, artwork, etc inside.