Do you know how to weld? I learned the basics at a silver-smithing class once, and since then I've been thinking it might be fun to fuse together giant pieces of metal. Yes, I know, it's kind of strange.
My first choice would probably be one of the metal sculpture classes at the Indianapolis Art Center, but here's an alternative: Sutton-Garten, which sells welding supplies, also offers a five-week introductory welding class.
The next class meets from 4 p.m. to 8 p.m. on Mondays in October. Here's the course description from Sutton-Garten's Web site:
"Introductory course covering fundamentals of oxy-acetylene, stick, mig, tig and plasma cutting processes. Approximately 10% class time and 90% hands on lab work. Class includes equipment setup, filler metal selection, proper weld techniques, general fabrication and art projects. Classes are small to maximize your time with the instructor."
I don't know what half of that means, but doesn't it sound fun?