This is a new revision of the project 1 proposal. However, when I sent to 3D printing center, this file was unable to be printed out for multiple reasons. 1. No flat base; 2. Thickness problem; 3. Inward protrusion.

This is a new proposal for the project. In this case I wanted to have an object that contains a flat base. The thickness needs to be revise. Meanwhile, right now after adding protrusions, the surface is not closed.