Old 3-day passes still good??

[grumpyandbashful]

My DS and I will be at USE for 2-3 days in July. I have some old 3-day passes (1999-2001) that MIGHT still have one unused day on them. Would they still be good now?? Also, if one was a child's pass bought in 1999, could I still use it for my son if he's now 12 ??
If these are expired, I'll buy the 5 day passes online before we head down to Orlando.
Thanks for any advice .