As with most things on our world the Ding-A-Lings were the result of a form of robotic evolution from earlier designs. Also produced by the Topper Toy Company these were known as ROBOTRONS. Originally 5 robotrons were planned but only two (Gofer and Rocket) were produced. The line was to include:
Rocket (Rocky). Two variations were made: one with red torso and blue legs and one with blue torso with red legs.
ROBOTRONS...THE MECHANICAL MIRACLES