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Published 10:57 18 Jun 2018 BST
Updated 13:45 18 Jun 2018 BST

If your child was one of the audience members disappointed that their wristband can't be used at home, give this tutorial a try.
It requires the use of a knife so this hack should be done by parents not children.
If all else fails the creator of the video suggests changing out the batteries from the wristband and it should reactivate.
It may seem like a lot of hassle for a flashing bracelet but I think most parents, myself included, would rather fix something than deal with a broken-hearted child.Explore more on these topics: