Sun cream ?

I designed this bracelet, to help make sure my kids use sun cream!

Because they are very sensitive to the sun.


I uses Photo Chromatic PLA, from http://3dfilaprint.com

http://www.shop.3dfilaprint.com/pla-175mm-white-to-blue-ultra-violet-reactive-filament-568-p.asp


which is sensitive to UV lite !!