Discovery 4-Cylinder Engine Model Kit TK010 for Children

Build a 4-cylinder engine using 103 parts and explore how a motor engine works. The assembled engine model features realistic valves and spark plugs. This authentic toy lets you observe how the pistons turn the crankshaft. The transparent body lets you see how it functions based on engineering principles. Introducing Discovery #MINDBLOWN, a new educational toy series that lets you touch, play, and learn! Requires two AA alkaline batteries (sold separately)