Marble Display Stand, Designed by a 10-Year-Old
I'm not sure anyone else is going to be interested in printing one of these, but I figured I'd share it anyway.
My 10-year-old son came up with this idea, and we brought it to life with 3D printing. It was a great experience for him, and for me! You can read more about that here:
http://3dprinting.truthinside.org/2013/12/17/marble-display-stand-designed-by-a-10-year-old/