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3D Mechanical Pterosaur STEM Kit 3D Wooden Mechanical Dinosaur Kit Mechanical Pterosaur Kit 3D Puzzle Craft Wooden Building STEM Projects For Kids Ages 8-12 - RS63903D Mechanical Pterosaur STEM Kit 3D Wooden Mechanical Dinosaur Kit Mechanical Pterosaur Kit 3D Puzzle Craft Wooden Building STEM Projects For Kids Ages 8-12 - RS6390