After I discovered that cardboard can be cut by laser, this become my top choice of material for my project, I am in the process of creating a series of designs with cardboard, which I call "Trash to Treasure", I have been creating 3D multi layers designs, this is the first time I attempt a true 3D idea. Please check the How-to section for more details. I used to drag the boring shipping boxes cut up, but now, I am looking forward to doing it and making them into beautiful and fun artwork.
Hope that this post will inspire you to get into a fun way to recycle.