Make, experiment, and play! This activity kit will have you building 11 machines including a gravity powered car and a wacky boxing robot. The fun doesn't stop once you've completed all of the projects in the book - open-ended prompts will inspire you to continue experimenting with your own designs and modifications! Comes With: 58 LEGO® elements, 6 sheets of papercraft | LEGO Gadgets by Editors of Klutz, Hardcover | Indigo Chapters