Try "Good Morning" by the Beatles. "Revolution" would also be a good choice. Or "Twist and Shout." Of course, they'll blow out their little vocal chords trying to imitate John Lennon, but they'll be awake. Lots of Beatles songs would get them up and moving. I was born the year "Sgt. Pepper" came out, so I'm a HUGE fan. Now I'm going to have to go home and look through all my Beatles CD's.