Explore the physics fun found in these moving machines! Kids can build their own catapult, trebuchet, and windmill, then make 'em move when they explore. This STEM building set comes with all of the pieces kids need to build, test, and tweak their moving STEM creations. As they build, they'll learn about kindergarten STEM skills from engineering and design to force, motion, and more. Kids will also use their newfound critical thinking skills to tweak their machines and solve the set's tricky STEM challenges! After they master the set's progressive STEM challenges, kids can even build their own!Details:Develops critical thinking and early STEM skills56 piecesFor ages 5 and up