This is a case of 250 sets of motor parts. Sets are packaged into boxes with 10 sets per box (25 boxes per case)
3V 11,500 RPM high powered DC motor provides plenty of torque for drive wheels and thrust for propeller-powered projects 
Plug and socket wire connectors make it fast, easy, and safe for kids to assemble their own circuits 
Comes with 250 motors, 250 2x AA battery holders, 250 motor holders, 250 blue plastic propellers, 250 green wheels, and 250 adhesive pads 
Designed for STEM projects like propeller-powered cars, electric vehicles, and robots that jitter, scribble, and doodle