Bf has a magnet, are there any supplementary wearables I could get him?

He got his a year ago, and I think it’s crazy but also kind of cool. Anyway I thought I should learn more about his magnet and stumbled across the bottlenose which seems to still be in development.
So I was thinking of getting him a gift, and was wondering if there’s something similar to it. Or if not, has anyone found anything unexpectedly fun to use with your magnet?

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