Gravity-Defying Rotating Device
Puzzle 8 of Making Sushi Pack
Question is: Gravity-Defying Rotating Device
and the answer is: GYROSCOPE
Word Meaning:
GYROSCOPE — An apparatus composed of a wheel which spins inside of a frame (gimbal) and causes the balancing of the frame in any direction or position. In the form of a gyroscopic stabilizer, used to help keep aircraft and ships steady.
Definitions from Wiktionary.