I limited my metal-plating chemistry to items commonly found in kitchens and thought to be relatively harmless. For example instead of sulfuric acid or nickel chloride (both rated "extremely dangerous" by the NFPA) I used vinegar (5% acetic acid) and saccharin (artificial sweetener). Check out my metal-plating Instructable tutorial for complete instructions.
ALSO - For a limited time you can WIN my Thor hammer! All raffle dollars go to a non-profit called Reinvented Magazine that works to inspire young women to get involved in science and engineering.