Chess Set - All in one ( ECO )

Hello, I am a third year student at Hadassa College In Jerusalem in the industrial design department. My project refers to the problems we all have to compete when we use the 3D printing machine. Many times we started a print at the machine and it dosn't work so well so we need to start again, but what are we doing with the Piece of plastic that go wrong? most of the time we trow it away.

My project deal with this problem, why we can't design somthing and treat to the design process in a diff