When we go to WDW this Fall after our DCL cruise our college aged daughter will only be able to go to the parks on Saturday and have to fly home on Sunday afternoon due to having college classes on Monday. The rest of us are going to stay on for a few more days. Here is my question: I was going to get her an all day park hopper for the Saturday that she is there for all day. Now on Sunday morning I was going to let her use my park hopper ticket so she could enjoy a little bit more time at the parks before leaving for the airport. Now I have read something about the machines reading your fingerprint or something like that. Does that mean that she would not be able to get away with using my parkhopper for a couple of hours? I am not going to buy her a whole day ticket when she can only spend one to two hours at a park. Please let me know how this works or if this is a bad idea. TIA!