How to use: You can play with these Hot Wheels Monster Trucks Big Rigs right out of the box. Push them on flat surfaces for fun races. To transport an additional truck, use the tow hook to pull it or place it on the flatbed. Attention: Additional trucks are sold separately, so if you want more, you'll need to buy them individually. The styles are randomly selected when dispatched, but you can leave a note for your preferred style. Maintenance: Keep these trucks away from water to avoid rusting. Store them in a dry place when not in use to maintain their good condition.