I do believe I've heard of that song by The Oak Ridge Boys- "Thank God for Kids"- it's a nice song. I see no reason why they couldn't sing that on Sesame Street. After all, Fozzie Bear sang "America the Beautiful" (including the line- "God shed His grace on thee") in "The Muppet Movie". And in the "Happy Holidays" video release, Prairie Dawn had the Sesame Street gang putting on a Christmas paegant with the traditional nativity scene depicting the birth of Jesus. I don't think a song like that should be a problem at all.