Using the Discovery Grab & Go Galaxy Lantern is a breeze. First, make sure the batteries are properly installed. To use it as a night light, simply turn it on. If you want to use the projection mode, select a slide wheel with the space - themed images you like and insert it into the device. You can adjust the focus ring to get clear images and use the rotating head to change the projection direction. When you're done, store the slide wheels in the integrated hidden storage compartment. For safety, keep the lantern away from water and don't let young children play with the batteries. To maintain it, wipe the surface with a dry cloth regularly. Enjoy exploring the universe with this wonderful lantern!