B.LivelyPull them back and then let go!No batteries necessary. Let's make this planet happy!Each car has its own identity and duty.Perfect for those itty bitty hands.6 different vehicules: Yellow Bus Gus, Freddy Zoom, Officer Lawly, Muddy Miles, Groovy Patootie, etc.Toy dimensions: 3.4'' x 2.36'' x 2.55''1-5 years