We bet Moving Color's Temperature Sensitive Tile ($30/tile) would have been huge if it had come out in the 70s. But, we think it has huge potential now, too! Moving Color's heat sensitive tiles change colors according to the pattern that you purchase. For example, there's a Northern Lights tile, a Watercolor tile, and of course, a Tie-Dye tile! We think it'd be pretty magical to turn on your shower in the morning and watch the Northern Lights gradually span across the shower wall.