MP3-player holder:
My little brother came to me asking if I could make him something that could hold his MP3 player onto his belt. This was redesigned several times as each time we made an improvement, we would print it, and find something wrong with it yet again, till we finally came up with the final product.
First Prototype:
I first made a prototype that would prove whether the design concept would work or not. After testing it, we decided it would work after some improvements.
Final Version:
The 3-D printed MP3 holder: