We used Child Swap on Dinosaur in Animal Kingdom. We actually walked up and then found out our DD was too short (very thankful for this after riding it). The CM right away asked if we wanted a Child Swap pass. DH, DS 5, and Nanny rode first while DD1 1/2 and I (Mom) walked around. When they came out I was able to take the pass and go with up to 2 people through the fast pass line to ride again. Only my husband came with as my son had enough on the first ride, and nanny had to watch DD. If there is a ride some of you want to ride twice use the Child Swap option.