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Kids will love discovering the wonders of machinery and robots as they construct a catapult, make their own machines and experiment with basic robotics and physics! Perfect for inquiring young minds, the activities in this kit are fun and educational, providing a strong introduction to the wonders of science. By combining the items in this kit with common household objects, the Making Machines book shows science enthusiasts how to do super-exciting experiments, simply and safely, at home. • 10 Split pins • 1 Straw • 2 Wooden dowels • 4 Packets of air-dry clay • 3m Cotton string • 1 Bolt • 3 Nuts • 10 Washers • Cardboard pincer pieces • Cardboard trebuchet pieces • 24-page book