Using your Hello Kitty Little Moon Light is super easy. Just press the button on it, and it will start glowing with a lovely light. It's great to put in your bedroom or playroom to create a cozy atmosphere. As for the age limit, it's suitable for kids 3 and up, so younger children should use it under adult supervision. When it comes to maintenance, keep it away from water and don't try to take it apart by yourself. If you notice that the glow isn't as bright as before, it might be time to replace the batteries (not included). Remember, the styles are randomly selected at dispatch, but if you have a favorite, you can tell us in the order notes. And if you really want to be sure to get the style you like, head to your local Toyworld store.