Our metals unit is over :( I made a piece that looks like a butterfly on a leaf. the bottom is brass then the leaf is copper and the butterfly is silver. It was so hard to cut out the little rain drop cut outs in the brass and the cut outs in the leaf but i love how it turned out! The one major issue i had was putting on the butterfly, it wouldn't sotter on i tried so many times (we ended up just gluing it). All the heat did turn it a great color though. This unit was so much fun and I hope I can take it again next year!