The Vtech Toot-Toot remote-free monster truck uses IR sensors that detect the child and reacts accordingly. Two modes of play encourage the child to move and follow the truck. Light up roof button triggers facts, phrases and songs. Stop and Go buttons teach colours, safety and trigger left, right, forward and spinning moves. The monster truck encourages motor skills, role-play, fun and language development. This monster truck is perfectly sized for little hands. It has built-in sensors that avoid obstacles.