As the others have said, you're never to old. I started when I was 34 with my son who was 14 at the time. It was my wife's idea, something for us to do together. I was thinking she was crazy and that I was too old to start something like Karate. Well, I was wrong. It's great, at 41 I'm in better shape now than when I started. My son quit when being a teenager got in the way(he's in the Navy now) but I kept on going. My kicks are getting a little lower every year. I never regret starting, and when ever my wife gives me a hard time about going to train and just turn to her and say, "it was your idea, remember". Your not too old and it something that you and your son can enjoy together. Good Luck