Help! I have a friend who is taking her grandchildren to DLR next month. She has some give a day get a day tickets...but wants to know if they can be exchanged for 2 day park hoppers. She has tried to go online but was told that it can only be done at the park. Will this end up being more expensive? or should she just buy the 2 day park hopper online. Can the tickets be exchanged for gift cards....like the Birthday vouchers? I know this is an old topic. But I sure could use your help.