My little boy is fond of reading signs out loud now, and one of his favorites is "STOP!" I'm always looking for good songs with simple lyrics for kids, and this song is close to the top of my list. I always use "Hello Goodbye" to open my KidsMusicThatRocks singalong programs in the library because 1) it's a super song, 2) it's full of words like "stop," "go," "yes," and "no," and 3) it's the Beatles!!!
Gotta love their goofy antics, the psychedelic set, and the hula dancers (sure, why not? it's 1967!) at the very end. Enjoy!