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Set of both Klutz LEGO kits: 2 books and LEGO pieces kits!Design and build amazing moving machines - teach your bricks new tricks!
Chain Reaction Kit has 33 LEGO unique pieces, 6 plastic balls, string, paper ramps and other components
Crazy Contraptions Kit includes 105 LEGO bricks, gear & axle, all you need to create 16 unique projects
...plus two crytal clear photo illustrated step-by-step guide books to show you how!