The rattlebacks are available in the colors red, orange, and green.
Color picked and shipped at random
Tedco Toys's rattle back is a science curiosity whose ancient and mysterious properties capture the attention of all ages. Rattleback will spin in one direction but when spun in the wrong direction, it will quickly stop, rattle up and down, and then begin to spin in the opposite direction. It also magnifies and is sure to entertain for hours!