Description Assemble a high-quality foot-and-a-half tall chipboard gravity drop tower full of LEGO contraptions. Unleash a pack of 6 wood balls from the starting gate and watch them race through a maze of twists and turns, sliding down ramps, flipping spinners, and whirling down a funnel, before they finally plonk into their destined buckets. (All included right out of the box!) But it doesn't stop there. Build and rebuild activities that include a gravity labyrinth, zip-line starter, grabber claw and more. Fun, non-fiction content highlights the crazy machine inspirations of Rube Goldberg and creative ways to theme your own pinball-style arcade game. Learn about famous... Show More Small Parts – Not for children under 3 yrs. Product Details ISBN13: 9781339019123 Format: Art and Craft Kit Ages: 8 - 12 Grades: 3 - 7 Pages: 64 Weight (lbs): 1.94 Dimensions: 10 x 1.9 x 10.1 Language: English