With a satisfying "thunk," the Tennis Ball Launcher shoots high into the sky, delighting kids and adults alike with the power of air pressure. Using a pulley, visitors first lift a bowling ball by pulling on a rope. When the bowling ball is released, it compresses air in a cylinder, which travels to another, smaller tube holding a tennis ball. The concentrated compressed air becomes a propellant, forcing the tennis ball high into the air. A conical net funnels the falling tennis ball back into the tube for the next shot.

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