My kids are huge fans of Signing Time. I have this ridiculous fear that we'll be in Utah at some public space and see Leah and my kids will sign and scream "LEAH! LEAH!" Especially my 2 year old. She watches their videos over and over and has a pretty good signing vocabulary. My kids don't really know primary songs, but they can sing Signing Time's opening song.
I've been glad to have the videos since I've learned a lot of signs, too. Thanks to the videos I can kind of talk to a friend who is deaf.
And many thanks to the Newport Beach Public Library for stocking a lot of the dvds. I love that library.