Simple answer is, Yes. The child swap is good for up to 3 people to ride the second time any time later. Its used just like a paper fast pass. Here is what we did as an example. WE made as fast pass for 7DMT for me and my oldest while my wife had a fast pass with the youngest for Belle for the same time. We went to the fast pass line and asked for a child swap, then me and the oldest rode with our fast pass. Later that evening my wife and oldest used the swap ticket to ride it again.