Design for 3D printing is hard. You can go buy the MakerBot Digitizer for $1,400, or you can use some free software like Autodesk 123D Catch. But what if you want to design something creative, from scratch?Leopoly is a web-based product that lets you sculpt in 3D. You literally start with a digital ball of clay, and push it and pull it until you have something you like. It was created by Leonar3Do International, a 3D tech startup company, founded in 2010 and based in Budapest, Hungary. The company has …