Build your own Smartivity Torque Buster racers! These Build-it-Yourself vehicles; Stunt Demon, Highway Hog, Speedster, Rally Racer and launchers teach the principles of motion, elasticity, torque. Follow the detailed, easy to understand, self-paced instruction manual with large, easy to follow pictures to build these creative toys. After builder these 3D wooden models place them in the launcher, press the release button, and watch them go! There are two sprint launchers included so you can race your friends. ASTM, EN-71 Toy Safety Certifications: tested in international toy-testing laboratories to ensure your child’s safety. This patented design is sturdy, durable and non-toxic and trusted by parents and loved by girls and boys 6 years and older throughout the world. Smartivity is focused on building toys with a purpose. We believe in the power of play, the promise of STEM, and the pride that comes with making things with your hands. Every child has the potential to shape the future, and it starts with the allowing kids to explore the fun world of interactive play while also encouraging cognitive and tactile learning. Our line of build-it-yourself toys empower kids with the intrinsic understanding of STEM fundamentals through play.