Using these Hot Wheels Monster Trucks is super easy. Just hold the truck in your hand and roll it on a flat surface to see it zoom. You can also re - create the exciting moments from the show by setting up your own tracks. When it comes to storage, keep them in a dry place away from sharp objects to avoid scratches. If they get dirty, you can use a soft, dry cloth to gently wipe them clean. Remember, these trucks are for kids 3 years old and up, so make sure younger children don't put small parts in their mouths. Each truck is sold separately, so you can collect as many as you like, but availability might be limited.