I Like To Eat (Apples and Bananas)
(source: "The Worm Song and Other Tasty Tunes, Janet Wilson, 1993; also in "Campfire Activities", Girl Guides of Canada, 1993.)

I like to eat, I like to eat
I like to eat green apples and bananas
I like to eat, I like to eat
I like to eat green apples and bananas

Repeat changing all the vowels to a,e,i,o,u (ex: A lake ta ate, A lake ta ate...)