VTech Go! Go! Smart Wheels Utility Vehicles 3-Pack Roll the vehicles over SmartPoint locations on Go! Go! Smart Wheels playsets (each sold separately), and they'll respond with different phrases and more Press each toy vehicle's light-up button to hear three sing-along songs and learn the letters "S" and "T" Push the vehicles to hear fun sounds and melodies Push them again to add fun sound effects The SmartPoint vehicles also work with Go! Go! Smart Animals playsets (each sold separately)