VTech Go! Go! Smart Wheels Emergency Vehicles 3-Pack Press each toy vehicle's light-up button to hear three sing-along songs and learn the first letter of the vehicle's name Roll the vehicles over SmartPoint locations on Go! Go! Smart Wheels playsets (each sold separately), and they'll respond with different phrases and more 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) Includes 3 sing-along songs and over 40 unique educational phrases and sounds in every vehicle. Each push toy vehicle operates on 2 AAA batteries that are included; automatic power-off saves batteries