If you watch the following video and jump to 2m18s you will see exactly what it is: http://youtu.be/wZJ5KhlMqkY?t=2m18s (Feel free to share this video where you think it will be enjoyed) Just a useless thing but fun to look and play with. You need 8 copies of the STL. You need rubber bands to assembly it, I used 2cm (0.8inches) rubbers found in the same place where you can buy hair bands. Maybe you can resize the object to adapt to other rubber sizes. Supports needed on both STL, there is only one difference between crazything.STL and crazy.thing.manual.support.STL, the second have a breakable support where slic3r was not able to create it. Any print quality works, 0.35mm, 0.2mm and 0.1mm tested. You can follow assembly instructions in this video: http://www.youtube.com/watch?v=wZJ5KhlMqkY