Things that change color are awesome. Think mood rings, chameleons, and Hypercolor t-shirts. Okay, so maybe the Hypercolor gear wasn't so great, since it always seemed to call attention to our armpit region. Luckily this Del Sol Color Change Nail Polish ($10) has all the fun without the risk of embarrassment. The UV-sensitive formula is one shade indoors, then transforms to another when you head outside.
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