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Amazon.com: Goliath Boomtrix Stunt Pack Kinetic Metal Ball Chain Reaction Stunt Kit - Fun - Educational - STEM : Toys & Games
Amazon.com: Goliath Boomtrix Showdown Kinetic Metal Ball Chain Reaction Stunt Kit - Fun - Educational - STEM, includes Giant ramp tower that can release up to 15 balls at once : Toys & Games
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Goliath BoomTrix Kinetic Launch and Multiball STEM Metal Ball Stunt Kits - Walmart.com