Some elements can be identified by the colors they emit while burning. This is a quality that chemists use to identify salts, by burning them. In this video, a science teacher douses several exotic salts in methanol and ignites all of them at the same time. The results are really spectacular -- green, orange, yellow, blue, and purple flames burning side by side. [2:01]
Do not do this in your parents' kitchen or you will become very good friends with the local fire department, and probably the local police as well.
Just remember to NEVER, NEVER have your stock methanol bottle open when there is open flame about. People get injured/die almost every year in schools doing this kind of thing. (Often by squirting more alcohol on the flames as they die down)
I decided to stop doing this for concern about breathing heavy metals, but rubidium is cool - really red (but so is lithium usually)- and lead makes a very strange looking white flame (in the fume hood of course!) Strontium has a radioactive isotope that becomes lodged in the body because of its similarity to calcium. Very good demo, but don't inhale!
Also, any high school students/young undergrads reading this, recall that methanol is POISONOUS. Even inhaling the vapour can cause blindness/death.
The flame test experiments should be part of a standard chemistry lab, where you'll perform it in a much safer and controlled way.