My DD7 & DS6 also collect the pennies. I am not sure what it is called--that container that is sealed which is worn around your neck that people use to keep their money and room keys in at water parks--but last year, every morning I put quarters and pennies in my childrens' containers so they were able to be in charge of it themselves and then hold onto their new coins without losing them. Then, when we got back to our hotel room, they put them in their Disney coin book. We will be bringing the coin books back this trip. It really is a fun and inexpensive hobby for them.