A developmental toy for small children includes a contacting member is rotated
by an electric motor and a controller that, in response to input from a sensor,
signals the electric motor to move the toy from a starting position for an initial
period of time in an initial direction and signals the motor to wait a resting
period of time. If no further input is received from a child that is detected by
the sensor within the resting period of time, the controller signals the motor
to move the toy back in an opposite sense, toward the starting location.