Five little dinosaurs went out one day (five fingers up on right hand)
Eating trees along the way (clap arms together like 2 large jaws)
Here comes Tyrannosaurus, big and fat (make left hand into large mouth and "SNAP!)
Four little dinosaurs go hurrying back.
Repeat: Four, three, two, one. I usually let the last little dinosaur say, "Missed me!", and get away.