I bought a candy bar for my son at a 7-eleven. We found a penny inside of it so do we have the right to file a law suit?

If the only result of buying the candy bar was that you found the penny, there has been no damage to you or your son that I can find. You don't get a big recovery because of a "eew" thought in reaction to the candy bar. If, however, your son bit into the candy bar and broke his tooth because of the penny, or got violently ill because of something in the bar, you might have a claim that would be economically viable - worth the cost of prosecuting a claim with sufficient probability that you'll get enough money to make the effort worthwhile. Take care - Brian Chase,  BISNAR|CHASE, Personal Injury Attorneys.  http://www.BestAttorney.com http://www.ProductDefectNews.com  800-956-0123