Abstract: A device for causing a toy to simulate a yawn or sleep condition, includes an actuator mounted in the toy which is pivotable between first and second positions when a stimulus is applied to the toy. A sensor is provided for detecting one of the first and second positions of the actuator. A microprocessor is operably connected to the sensor for receiving and storing signals from the actuator. The microprocessor counts the total number of signals and transmits an activation signal to the toy to simulate a yawn or sleep condition when the total number of signals detected by the sensor reaches a preset value.