The first tunes I learnt for public performance (singing at neighbours' doors in return for a ride on the milkman's horse and cart when was about 4 years old)were:

"What did the poor little moths live on when Adam and Eve were there"
and
"How can a guinea pig show he's pleased if he hasn't got a tail to wag"

I learned these songs at my mother's knee and she, in turn, learnt them from the horn of her uncle's wind up gramphone.