Who said "I don't understand grown-ups, but I'm learning."?

This quote is attributed to Billy.

I don't understand grown-ups, but I'm learning. - Billy

"I don't understand grown-ups, but I'm learning."

Billy Education

"I'm a big fan of science!"

"Mandy, wouldn't it be great if we could stay young forever?"

"I love the smell of destruction in the morning!"

"Why does everything have to be so complicated?"

"Education opens doors."

"Education opens doors to endless possibilities."

"I ain't got the education you got, bub."

"You can't put a price on history."