If you watch the following video you will see exactly what it is: http://www.youtube.com/watch?v=n6PNKXeDwuk 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, any print quality works, 0.35mm, 0.2mm and 0.1mm tested. You can follow assembly instructions in the video. (Feel free to share this video where you think it will be enjoyed)