Younger 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! Discover the science behind the amazing workings of robots and machinery as you make your own completely operational trebuchet, create machines that really function, experiment with the science behind robotics and more! Perfect for inquiring young minds, the activities in this kit are fun and educational, providing a strong introduction to the study of STEM. By combining the items in this kit with common household objects, the Making Machines kit shows science enthusiasts how to do super-exciting experiments, simply and safely, at home. Details: Making Machines 10.31" x 7.6" x 2.01" box size 51 pieces Includes 24 page book with 9 experiments For ages 6 and up Contents: Cardboard pincer pieces Cardboard trebuchet pieces 10 split rings 10 washers 4 packets of air-dry clay 3 nuts 2 wooden dowels 10ft cotton string 1 bolt 1 straw