Hey there Sierra, nice to see you are being so safety concious!
Okay...the ABC of a fire extinguisher is what it can be used on...A: trash, wood, paper B: Liquids and grease and C: electrical equipment. That is a fire extinguisher that is pretty well great for all things, especially what we do.
I have a 3lb First Alert Dry Chemical extinguisher Classification 1-A:10-B:C, never had to use it though *knocks on wood*. No extinguisher should be used on a person les than 6 feet away and not in a person's face. Good for body though (meaning it won't frostbite a person, correct me if I am wrong someone but isn't the CO2 extinguisher the frostbite causing one?), just have the person cover his/her face with his/her hands.
Anyway, this is the fire extinguisher that was approved by my local fire department for my fire performances. You can get it from your local home depot store or from a discount Wal-mart K-mart type store. Depending on the size you get they run $15 to $60.
Best to you! 
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Pele
Higher, higher burning fire...making music like a choir...
http://www.pyromorph.com