Just to be safe, I would upgrade to an adult. They could question it otherwise, especially if your daughter looks much older. You see, the reason adult passes start at age 10 is primarily related to the height restrictions on the rides. The average child is tall enough to get on all the rides once they are 10, so they get classified as an adult. If she looked younger or was quite small for her age, heck, I would try to get away with the kids pass!