wow, I had the hardest time picking just three options! That instructables site is pretty rad. Here's what I have managed to narrow my favorite finds down to:
SQUID PASTA!: http://www.instructables.com/id/Calamari-di-pasta-pasta-squid/
Glass etching: http://www.instructables.com/id/freehand-glass-etching/step1/gather-materials-and-tools/
Waffle Iron adapted into Mini Kiln: http://www.instructables.com/id/Waffle-Iron-Adapted-into-MIni-Kiln...or...The-Bava/
Lost wax casting: http://www.instructables.com/id/Lost_Wax_Casting/
The kiln one might be hard to find all the materials for, as much as I would like to do it. Lost wax casting is my alternative 3rd option, because I need to practice doing this anyway.