Design & Build a Chain Reactions Machine Following on from Lego Chain Reactions, children can build a 1.5 feet tall chipboard gravity drop tower, with 168 lego bricks! You can build outside the book as the pegboard structure allows you to customize and expand with LEGO bricks from home. Children can make and play games like Splinko, Labyrinth, Super-Slide Fortune Teller and and Zipline in this fun kit. Make amazing machines in Lego Gravity Drop Children can use all the included LEGO pieces in conjunction with their own collection! It comes with everything you need - including 168 LEGO elements, 6 wood balls, 6 heavy duty chipboard panels and 3 paper punch-out sheets What is Klutz? Klutz is a premium brand of book-based activity kits, designed to inspire creativity in every child. Our unique combination of crystal-clear instructions, custom tools and materials, and hearty helpings of humor is 100% guaranteed to kick-start creativity. Super-clear instructions Open-ended Creativity Rewarding Reading Skills to Build On Everything You Need