Wind chimes made from cans. Tin cans are not just for stacking up in your cabinet, tossing in the trash or sending to the recycle bin. Combine those with a rope, paints, craft papers and a generous helping of crazy imagination, and you will have a cool creation on your hands. http://hative.com/recycled-tin-can-craft-ideas/
How to make flowers out of tin cans and plastic bottles. Adventures of the Art Junk Gypsy: Garden Art. (...I made one of these this past summer and was very happy with it, although I had some problem manipulating the plastic at the bottom. Like anything it takes practice. I'll make another when I save more plastic bottles).