Excellent loose model which is really smooth to play. I use these in my classroom a lot so overtime I've been embossing them with little relevant vectors for individual students or classes. 

This set includes Pi, star, pencil, rocket and heart versions

Deliberately does not have the stencils on all facets of the cube as they love seeing them appear and rotate as they flex it. 

The first profile requires an AMS so is slower. I've all on one plate for ease of print. Disable any you do not want.

The second is embossed into the infinity cube so works great for single colour. I usually use a glitter filament or dual/tri silk (with an extra wall) to make them a bit more appealing when they aren't multicolour.