The batteries used are included. To change you have to loosen a bolt. The batteries are in the lighthouse, orderly out upholstery, embedded and you can tell from the outside nothing unpleasant. There is also a small switch for on / off. Closed and opened, the interior by means of a zipper, which, however, can not open the child. Because it lacks the part, where you can pull up the zipper. Therefore no risk of injury also exists. For example we open white recommended aufzubiegen a paper clip and threading to open the tray.
The light is switched on, in which pressure is applied. It goes into every imaginable color. After 15 minutes, it switches off by itself. Möcht you turn off the light sooner, just press again on it. My only complaint, which is just personal feeling: for my taste the colors change a bit too fast and not so harmonious as I would have liked.
All in all I think the Bears really super. Grade for the little ones, the bear may be not only a friend, but protects them directly before the dark :) Nice idea.