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Ages: 5+Perfect for any budding engineer with a sweet tooth! Make your own gumball machine with a book of step-by-step instructions, adjustable ramps, custom snaps, and bumper guides. Then, keep the ball rolling with other gumball-related science experiments using simple machines. It's a ball of fun!1/2" gumballs not included.Comes with: Chipboard parts, Dispenser knob, Transparent acetate, Plastic fasteners