Imagine, bunches of clips from Sesame Street and The Electric Company!
Some of my favorites:
http://www.youtube.com/watch?v=_CKWoKxCLGA&mode=related&search=
http://www.youtube.com/watch?v=Z4VNMERVsC4&mode=related&search=
http://www.youtube.com/watch?v=1F8fi5uXIlo&mode=related&search=
http://www.youtube.com/watch?v=U3NLsTYDfeM&mode=related&search=
Good stuff! I never knew the letter W had a mean streak. ;D