These are fun, easy prints that take up just a tiny amount of filament. One of the cool features of a soft flexible like NinjaFlex (SH=85A) is that it sticks really well to windows and mirrors when printed at 1mm to 3mm thickness. It's important that your print surface and the windows you stick the decals on are clean ;) to insure smooth against smooth. Just wet with water and stick. I have some up in my office that have been there for almost a year. If you don't have any flexible filament you can buy some magnets at a craft store and turn these into refrigerator magnets. I started with images downloaded from 123freevectors from their free section and edited them for printing. I think if you scale them to be bigger and print in PLA they would make fun stencils Check out Flower, Butterfly and Bee Decals for Flexible Filament and the rest of my decal collection