For some reason, i think because he's closer to the ground than i am, my son keeps finding coins. He recently asked me what to do with a coin, and i said "put it in your piggybank". "I don't have a piggybank" he replies.
So a couple of days later the Piggybank Savings Company was ready for business.
Of course, now the boy's angry because he can't get his money out without tearing up the bank.