20mm Test Cube with Upcycle potential - a cube based snap toy.

thingiverse

I created a 20mm test cube nearly a year ago for personal use, and since then I have fine-tuned it by cutting circle and square holes through it to give me several tests in one: 1. XYZ calibration - the 20mm on each side is precise. 2. Hair test - the holes provide an excellent hair test. 3. Bridge Test - when the Square is oriented to the X or Y axis, as opposed to being Z axis oriented. I ended up with a bunch of test cubes lying around and my kids would play with them, so I decided to design a little connector gadget so that we can make interesting cubic shapes and art with these.