I found some interesting materials at a local fleamarket (http://www.electronicsfleamarket.com/): a canister of lithium sheet metal, and a bottle of fine zirconium powder (325 mesh). The zirconium is stored under water since the dry power can self-ignite, or may be ignited by static electricity or shock. Confusingly, the MSDS sheets say that dry zirconium powder must not be allowed near water, but http://www.blogger.com/img/blank.gifif it is to be stored, it must be completely submerged in water. I carefully dried a very small amount, and sprinkled it over a flame.
If you know of something interesting to do with these chemicals, please let me know.