If you have two adults in your party and a child or some children who can't or won't ride a certain ride, you can go to the Fast Pass entry line and ask the attendant for a Child Swap pass. This allows an adult from your party to wait in line and ride a ride while the other adult waits with the kids. When the first adult finishes, the other adult can then get on the ride through the Fast Pass entrance. This is an option for parents that allows them to ride a ride without waiting in line twice. Very helpful during our trip.