Please ensure the booster is assembled correctly; press the booster components together so that the 4 clips *click* into place. This should be done on a firm surface and not on a carpet or other soft surface. 

Turn the power switch of the booster to the OFF position. Please ensure that there are fresh batteries (4 D batteries) installed in the booster component. Remove any debris from the booster, and then turn the power switch to the ON position. 

Please note that if the booster component pieces are not connected correctly, the playset will not perform the way it should.

To preserve battery, if the playset runs for 4 minutes without any activity (no trucks pass through), the light will start blinking red, and the booster will turn off. To turn the playset back on, move the power switch to the OFF position and then back to the ON position.