Using these Hot Wheels Monster Trucks is super easy. Just hold the truck in your hand and roll it on a flat surface. You can also let the kids play with them on the floor or a small track. For younger kids, make sure to supervise them to avoid any choking hazards as the trucks have small parts. When it comes to maintenance, keep the trucks away from water to prevent rusting. If the trucks get dirty, you can use a dry cloth to wipe them clean. Store them in a dry and cool place to keep them in good condition.