The 3rd graders made tin insects for their auction project. They each started with a 5x5in piece of 36 gage aluminum (about the same thickness as a soda can). First, we drew and colored in our insects with colorful sharpies. Then, we added texture by pressing into the aluminum with dull pencils from the front and back. This raised any areas they wished to emphasize. Our last step was to cut them out and mount them all together.