SainSmart Jr. Friction Car Push and Go Car Mini Powered Play Vehicles with Screen Button for Light and Music (Set of 4) (3 Sets) EASY TO GRIP - Lightweight pieces at the perfect size for young children to lift and roll. POWER PUSH AND GO - With a good push, they can easily travel across a large room. TACTILE ENGAGEMENT: More fun on pressing the windscreen to turn on the light, music or sound. EARLY LEARNING VEHICLES SET  Mini police car, fire truck, ambulance, and taxi with sirens sound accordingly. DEVELOPMENT: Sensory, fine motor, gross motor, logical, creative, linguistic, emotional and communication. Inspire growing minds with this fun and engaging our Mini Vehicles Play Set!