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MindWare KEVA Contraptions 50 Planks - 50 Wood Planks, 2 Balls & Building Instruction - Learn Basic Principles of Physics & Engineering for Kids - Age 7+ - Walmart.com
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Amazon.com: MindWare KEVA Contraptions 400 Plank Wooden Building Blocks Set - Ball Maze and Ball Run – 400 Precision Cut Wooden Planks, 2 KEVA Balls and Idea Book : Toys & Games
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Amazon.com: MindWare KEVA Contraptions 400 Plank Wooden Building Blocks Set - Ball Maze and Ball Run – 400 Precision Cut Wooden Planks, 2 KEVA Balls and Idea Book : Toys & Games
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