Using the Hot Wheels Speedway Hauler is easy and fun. First, you can use the big semi - truck for push - around play. To turn it into a racetrack, simply pull the secure latch at the back, and it will unfold into a six - foot long track. Put the included 3 Hot Wheels cars or your own (additional cars sold separately) on the track. Convert the truck's cab into a dual launcher for a fair start in multi - car races. The trigger at the end of the lane adds an exciting element to the race. If you want to connect it to other Hot Wheels City sets, just attach the tracks together. When you're done playing, fold it back up and use it to store your cars. Keep in mind that colors and decorations may vary. Also, since additional cars are sold separately, make sure to handle them carefully. For maintenance, just wipe the toy with a dry cloth to keep it clean. This toy is designed for kids 4 to 8 years old, so adult supervision may be needed, especially when dealing with small parts.