Using these Monster Jam trucks is super easy. Just take them out of the box and start creating your own stunts and jumps right away. You can set up a face - off between the two trucks in the 2 - Pack or host a big event with all your collected 2 - Packs. For safety, make sure kids aged 3 and up play under adult supervision. When it comes to maintenance, keep the trucks away from water and extreme heat. If they get dirty, you can gently wipe them with a dry cloth. Enjoy the Monster Jam fun!