These kits are specifically intended to be built and disassembled repeatedly, and classrooms are a great place for small ... 3D printed version, or even a giant hydraulic powered arm.

Inside is a PWM controller which sends power to a small DC motor. A 3D-printed arm is attached to the motor, which hosts a pair of magnets. As the arm spins inside the enclosure, the magnetic ...

The now-juniors at Davis Aerospace and Maritime High School in Cleveland, Ohio began working with 3D printers to create ... girl in Ecuador who lost her arm in a bus accident,” Andujar explains.