 Some are available in key clip form under the name Bumble Ball Jr. Variations were produced by Ertl such as the Bumble Ball Bolter, a colorful insect-like toy with several long legs, a head with synthetic blue hair, and a Bumble Ball torso.The toy is powered by a motor box with batteries mounted eccentrically.Its power switch consists of a knob that starts the motor when pushed in and stops the motor when pulled out.