Using the Hot Wheels City Ultimate Garage is super fun. First, place the two included Hot Wheels vehicles in the elevator on the first floor and take them to the second level to start a side - by - side race. For loop stunts, head to the third level and adjust the track pieces to direct the cars as you like. When you reach the fourth level, launch your cars at the dragon. If the dragon eats your car, it will 'poop' it out. After playing, park your cars in the more than 50 available parking spots for easy storage. Connect this set to other Hot Wheels sets (sold separately) to expand your city. As for maintenance, keep the set clean by using a soft, dry cloth to wipe off dust. Avoid using harsh chemicals. Make sure small children don't put the cars or small parts in their mouths. This set is for kids 5 years old and up, so adult supervision is recommended for younger kids.