New TPU Filament for Christmas

I got some new TPU Filament for Christmas in a few new fun colors. I always print the toys for my kids in TPU for durability. So I used the new Sainsmart Yellow TPU and noticed something cool about the cut end of the filament. Fairly transparent filament with the right index of refraction lends itself to a cool effect. Now I need to figure out a way to design a project to take use of the fiber-optic effect :slight_smile: