21.   Because wood stains change color over time, it can be tough to match existing cabinetry, and some cabinetmakers are reluctant to try.

22.   Body heat changes the colors over the surface of the garment, especially in the areas touching thighs, bellies and crotches.

23.   A heat-sensitive liquid crystal column changes color as you touch it.

24.   A kind of dress rehearsal for his Bilbao Guggenheim, which changes color with the changing weather.

25.   A properly functioning card will change colors in response to carbon monoxide.

26.   A. If you want to change the color, I presume the brick is already painted.

27.   A. Sure it would work, but I strongly suggest that you not change color.

28.   A. There are two groups of lizards commonly called chameleons, and they change colors in different ways.

29.   A taxicab changes color like a chameleon.

30.   A temperature stick is a one-time-use gadget that changes color when the meat has reached the proper temperature.