Using your Tamagotchi is easy. First, make sure the CR2032 battery is installed. Once it's on, you can start taking care of your virtual pet. Feed it regularly to keep it happy and healthy. When it makes a mess, clean it up right away. If it starts bothering you when it doesn't really need attention, don't be afraid to discipline it a bit. You can also play the Numbers game to have some fun and improve your chances of getting a cool Adult Tamagotchi. As for maintenance, keep it in a dry and clean place. Avoid dropping it or exposing it to extreme temperatures. And that's all you need to know to enjoy your Tamagotchi to the fullest!