LEGO Chain Reactions & Crazy Contraptions: Set of 2

LEGO building kits are packed full of ideas, instructions, and inspiration for LEGO machines that spin, swing, pivot, roll, lift and drop. Combine the machines to create chain reactions and contraptions of all kinds! Includes a book that teaches the skills (and some of the physics behind the fun) that kids need to create their own amazing LEGO machines. Each kit requires basic LEGO bricks to complete. Bricks not included.Includes 2 kits:LEGO Chain Reactions includes inspiration for 10 LEGO machines. Put them together and you get incredible chain reactions! Includes a 78-page book, 6 LEGO balls, 6 feet of string, 8 paper ramps, 2 paper pop-up signs, 1 paper funnel ramp, 1 paper flag, 1 paper bucket, 1 platform and 33 special LEGO elements that combine with basic bricks from your collection.LEGO Crazy Contraptions features 16 different machines to build. Includes all the plates, axles, bricks, wheels, gears, connectors, bushings and bands needed to create them. Build a Supercharged Speedster that can coast over 50 feet, or extend your reach by making a Squeezeclaw Grabber! Each project has easy, step-by-step instructions.- LEGO machines that are easy to build and fun to experiment with!- Kids learn basic engineering, concentration and STEAM skills- The perfect gift for LEGO collectors - Each kit needs basic LEGO bricks to complete