I wanted to share a wonderful thing I found several years ago while on a cruise. I spotted it again while in Florida browsing through a gift shop so I had to buy a couple more. It's a white tee shirt with black screen print on it.
This pictures looks pretty ugly...black and white
The thing is when you wear it out in the sun the screen prints burst into different colors.
What a great marvel
You can also buy jewerly that changes color. I bought a dolphine ring that turns from a white gem to pink.