This one's a special one - it's extra big and beautiful! In this experiment, I made a mold of a bowl using greensand, a type of sand used in the metalcasting industry for molding. Then, I poured a crucible full of molten aluminum into the mold and let it cool. After breaking the sand, I had an amazing aluminum bowl! The process was extremely fun and I am pleased with the results. Check out this experiment in more detail at Instructables:
http://www.instructables.com/id/Cast-an-Aluminum-Bowl/