
STEM Mechanics: Levers & Linkages by United Scientific is an Engino® construction kit for teaching how levers increase force and change direction of motion, and how linkages connect levers into machines. Students build 16 working models, including a seesaw, a wheelbarrow, a parking gate and a pantograph, with a booklet of instructions, theory, experiments and a quiz, plus an online guide. It suits physics and technology classrooms.