VTech Go! Go! Smart Wheels Recreational Vehicles 2-Pack Use the smart point vehicles to activate Smart point locations on go! Go! Smart wheels playsets (each sold separately), and they'll respond with different phrases and more. Press each toy vehicle light-up button to hear three sing-along songs and learn the letters a and H. Push the vehicles to hear fun sounds and melodies. While a melody is playing, push them again to add fun sound effects. Smart point vehicles Also work with go! Go! Smart animals playsets (each sold separately). For even more fun, collect other go! Go! Smart wheels vehicles and playsets (sold separately).