Any kid can be a winner, and get top marks at the school science fair, by picking one of these 100 proven first-place projects. Among the cool ideas are: demonstrate the action of magnetic fields, make a moon box, build 'ant architecture', and measure static electricity. Plus, there's plenty of fun in creating homemade perfume and erupting volcanoes; doing a bubble gum plant graft; and building a big green solar machine. Youngsters will find plenty of hints for crafting eye-catching displays, too.