I rented the first season to watch with my 7 and 11 year olds. It was definitely not for their age group. The boys are focused on undoing girls bras and getting hickeys and going all the way. In one episode Richie gets drunk.
To the person who commented before me, I would like to ask a question. Why would you show your children the first season of Happy Days? The first season is defintely not for children under the age of 10 (More for teenagers). If you want to watch suitable seasons try 3 - 9. These are more classic sitcom oriented, and contain most of the classic episodes of this amazing show. It really is a very wholesome show! I mean, not as wholesome as "The Cosby Show" or "Little House of the Prarie", yet it is still a nice family show. Overall, Richie is a very good role model and Fonzie beats up the bad guys! It is a true disservice to future generations if you don't introduce them to the Fonzie Character. If you keep your children away from this amazing sitcom, then sit on it! :D