STEM Mechanics: Gears & Worm drives, 1 Each

STEM Mechanics: Gears & Worm drives by United Scientific is an Engino® construction kit for teaching how gears change speed and force, how worm drives reduce rotational speed and how screws convert rotation to linear motion. Students build 12 working models, including a gearbox, a carousel, a helicopter and a screw press, with a booklet of instructions, theory, experiments and a quiz, plus an online guide. It suits physics and engineering classes.