Make a cross puzzle. If your child knows how to use woodworking tools, he or she can make one out of wood. If they know how to use scissors, they can cut one out of EVA foam, or a sheet magnet, and display it on the refrigerator. An even easier method is to cut the pieces out of light weight modeling compound such as Hearty (Karui Kaminendo, sold at 100 yen stores). If the pieces aren’t perfect, don’t worry about it, you can trim it with scissors after it has dried. But making the puzzle may be easier than putting it together! This looks simple, but it is really hard to figure out how to make a cross out of the pieces provided. So if your child knows the trick, and adults can’t figure it out, they feel smart. If you put it away until the next Easter, your child will probably forget the trick, and have to figure it out all over again, so it’s almost as good as making a new puzzle.