Lanterns are things that you put lights in, so you can see in the dark. They have a handle on top so you can carry them around. They come in different shapes and sizes, but they all do the same thing: make it easier to see when it's dark outside. Some people like to use lanterns when they go camping or hiking, because there are no street lights in the woods. Lanterns can be powered by batteries or by candles. If you use a lantern with a candle, you have to be careful not to start a fire. You can use a lantern to read a book or play games at night, or you can just use it to light up a room in your house when the power goes out.