17.1.11: Fire engine with rotating propeller

S combined 3 different toys and created this vehicle. He called it a fire engine, with a rotating propeller. Who knows, it could be flashing lights, water hose, rotating siren or propeller. He used the switch part from the gear toy and put it on top of the 'ikea' truck of wheels. Then he turned the switch on, and the  'propeller' rotated and he made fire engine sounds. I was impressed!