I thought the Heat Sensitive Table was the pinnacle of cool in the realm of thermochromatic commmodities, but this Heat Sensitive Tile has just upped the ante. Inspired by the stunning lights of Alaska, Moving Color's Northern Lights line begins with a 4 x 4 glass tile that looks black at room temperature. As heat is applied and increased--either from water or radiant output or a butt--the tile moves through the entire Roy G Biv spectrum. Very nice for showers or bathroom floors. Or doctor's examination tables.
Note: Cost listed is per tile.