Added 8 September, 2013
Remember mood rings? Probably not, but they were big in the 1960s and have come back in various guises over the years. In a way, you could call them some of the first wearable computers, as they used chemicals that react to heat to change color and supposedly reflect your mood. Fast forward to today and you don't even need a ring, just this fun nail polish that change color based on your body temperature, or the heat of your cup of coffee. Playful nail polishes are on-trend these days, and loyal readers will be familiar with those that glow in the dark, are candy-scented, metallic and made of suede. Pair that with the retro mood ring fad and this one is right up our alley.