3D Glasses

Some 3D glasses I made to print on my SeeMeCNC H1.1 3D printer. Made with Printcraft. For a Doctor Who themed chess set I will be making. Once I find a program to easily make a 3D object stl (suggestions?), I will make it not all minecrafty and blocky. It will have slots to put the lenses into and the lenses will be separate. I would love some feedback! My first thing!