Engino Discovering STEM Mechanics Wheels, Axles and Inclined Planes | 14 Working Models | Illustrated Instruction Manual | Theory & Facts | Experimental Activities | STEM Construction Kit Engino brings complex concepts into clear focus for budding engineers and Scientists with award winning components and step by step illustrated assembly instructions Learn how wheels and axles use friction to move objects easily and the mechanical advantage between large wheels and small wheels Build 14 working models such as a mobile staircase, Levered ramp with car, tractor, Tow truck and more Includes 18 pages of theory and facts, a 4 page quiz, 6 pages of experimental activities illustrating uses of wheels, axels and inclined Planes, 14 pages of step by step, 3D instructions Models illustrated online at Engino website or using the Engino 3D app downloadable free for Android or Apple iOS. Made in CYPRUS Designed and made in CYPRUS - no batteries required