It all depends on the knowledge of English these people have. I don't think the tune to be the most difficult thing to remember. Having learned English as a teenager, I can say that what seems pretty easy to remember in one's native language is not that easy in a foreign one. But let's say "I Stuck My Head in a Li'l Skunk Hole", "When Sammy Put the Paper on the Wall" if you want somewhat funny songs. I'd suggest that you'd have a look at our US and UK pages on Mama Lisa's World, some songs are for small kids but some are for bigger kids and even adults.