My brother-in-law and his grandson Colby during a get together over the holidays. He's only 2 years old. If you can't make it out, when he sings as he's carrying the guitar, he saying "Rock and Roll."
http://www.youtube.com/watch?v=GBjpqmVG-Ok
Jay
http://www.youtube.com/watch?v=GBjpqmVG-Ok
Jay