Wind up children's lanterns (Shipley, BD18)

We have 2 wind up children's lanterns, the green one works better than the purple one if I remember rightly. We had them for our grandchildren, you wind them up and then they can be turned on and off by the child, and can also be wound up by the child when in bed. They don't take batteries which is a bonus ! The more you wind them the longer they last. Any good ?
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