Build gravity-defying thrills that will leave you on the edge of your seat!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 physicists and "back to the junk drawer" ways to customize and create chain reactions with elements from home. Physics is fun with this STEM kit that lets you roll, bounce, rebound, and rebuild with LEGO!