I have 5 day disney passes with one day left which my family did not use. When I purchased the 5 day passes I was told they never expire. The passes are about 4 years old. I am going to Orlando in December and would like to use the passes to go to Animal Kingdom. My question is one of my children is now 12, will Disney allow her to use her child pass from 4 years ago or will I have to pay the difference. Will I just be able to slide the pass through the machine or do I have do get it revalidated because it is old? Thanks for any info.