Just in case you can't understand the words when Eth sings solo:
Three little monkeys swingin' in a tree
Teasin' Mr. Alligator, "Can't catch me!"
Along comes Mr. Alligator, quiet as can be
And snaps that monkey right outta that tree!
Ethan learned these cute little songs at Music Makers and he has been singing them in his adorable voice ever since.