This is the weirdest/best thing I've ever seen in my life. Highlights include: Fonzie and Henry Winkler teach kids about stranger danger, and the weirdest song ever to educate kids about genitals. Also John Ritter is there. it's unclear why. I don't know how to do the code. I'm so sorry.
https://www.youtube.com/watch?v=agK2uZBNbnU&feature=youtube_gdata_player