These pretty concrete pieces can become great jewelry bowls, or planters, or whatever you like. The supplies are Quikrete concrete mix, a sheet of photo paper, packing tape, a printer, scissors, Vaseline, and a plastic cup. Print out the template on photo paper. Cut it out and tape up the sides well with packing tape. Coat the inside of the paper with Vaseline. Take out any large rock pieces from the concrete mix. Mix the Quikrete with a little bit of water at a time, until you have the consistency of thick pancake batter. Pour concrete into your mold, place cup in the mix to the desired depth to form the inside shape of the bowl, and let it set until it seems solid but not completely set. Continue reading the tutorial here.