My stuff of the sphere is a plastic bag.I choose this object because I see plastic bags wherever. I want to know what the plastic bags impact our life and how does it make. Some environment problem because of the plastic bags. I have some solution of reducing pollution. For example,  the personal solution is reusing the plastic bags, the large one is developing the bio-base plastic bag made of bioplastic resin pellets made of cellulose or starch as a base material.

After I did project, I prove my creative thinking. In this project you should use  your creative thinking to find the interaction of spheres. I draw many picture also by creative thinking. I think I did a great job on it.