Light worked very well but 5 bricks wouldn't come on. The on/off switch is a small piece that you must pick up and remove from the bricks in order for them to work. They don't give you enough to control every stone. Which makes it really difficult to use without tearing chunks out of my lock. There are no instructions, so I don't know how and if the batteries can be changed. Too bad because I like the way they light up my Disney castle.
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