I love the shape of these vintage erasers. When I saw a whole bag of them for only 99 cents at Office Depot, I had this idea for a little office toy. 3D printing fanatics, here is my gift to you.
123D link : http://www.123dapp.com/AssetManager/Publisher?stgAction=getProduct&intProductId=597788
hingiverse link : http://www.thingiverse.com/thing:17992