Light-up button activates cheerful music and fun sounds Plays imaginative phrases and three sing-along songs Sound the alarms, because playing's never been so fun with the Go! Go! Smart Wheels® Fire Truck. Perfectly sized for little hands, this feisty Fire Truck entertains your child with a light-up button that activates phrases and sounds. The electronic vehicle responds to SmartPoint® locations on Go! Go! Smart Wheels® playsets (sold separately) with fun responses, sound effects, lights and music. Your little one will hear about the letter "F" and the name of the vehicle through imaginative phrases. Play time is on fire!