Using this Hot Wheels toy is super easy. First, when you want to use it in transport mode, just place your 1:64 scale toy cars inside the big rig semi. It can hold more than 20 of them. When you're ready for some racing fun, unhitch the rear lock. This will turn the hauler into a two - foot - tall track. Take the included Hot Wheels vehicle or your own, and send it down the gravity drop. You can also connect it to other sets for even more excitement, but remember the additional track is sold separately. As for maintenance, keep it clean by using a dry cloth. Avoid getting it wet as it may damage the toy. And make sure to keep small parts away from children under 4 years old because they can be a choking hazard.