It's from their Changing Channels cd, recommended for ages 3-8. There's also an accompanying book, which "gives children the tools to think critically about what they see on TV, resolve conflicts productively, and develop healthy self-esteem."
A Cathy and Marcy video for your amusement (Marcy is the one doing most of the talking):
I remember interviewing Cathy Fink a long time ago, although I can't remember what the occasion was. I do remember her telling me how many instruments Marcy could play... it was 30-something. So talented!
Cathy and Marcy offer cd or online music lessons on various instruments.