Here's one that I didn't know that my 5 year old just taught me.

There are two incompleat lines in the "quarter" stanza.
Anyone know them?

My mother gave me a penny
So I could pay back Jenny
But I didn't pay back Jenny
Instead I bought bubble gum
Ba-room Ba-room Ba-bubble gum
Ba-room Ba-room Ba-bubble gum

My mother gave me a nickel
So I could buy a pickle
But I didn't buy a pickle
Instead I bought bubble gum
Ba-room Ba-room Ba-bubble gum
Ba-room Ba-room Ba-bubble gum

My mother gave me a dime
So I could buy a lime
But I didn't buy a lime
Instead I bought bubble gum
Ba-room Ba-room Ba-bubble gum
Ba-room Ba-room Ba-bubble gum

My mother gave me a quarter
So I could ---
But I didn't ---
Instead I bought bubble gum
Ba-room Ba-room Ba-bubble gum
Ba-room Ba-room Ba-bubble gum

My mother gave me a dollar
So I could become a scholar
I didn't become a scholar
Instead I bought bubble gum
Ba-room Ba-room Ba-bubble gum
Ba-room Ba-room Ba-bubble gum