This is kind of cool. It's a 3D printed adapter which can turn pretty much anything into a stool for you to sit on. It's basically the 3 hole piece which you then put legs into, then anything you want on top for the seat. You can find the stool adapter at Thingiverse here:

http://www.thingiverse.com/thing:246236

Here is a picture of the actual 3D printed piece:


And here is an ice stool that was created with the adapter: