CF'er, I have read that if the child is a certain age when the trip starts and has a birthday while there at Disney, the age they were when the trip started is the age Disney considers them. As for the OP, I too wouldn't chance it. I'm having the no lying battle w/my five year old right now and it would bother me to lie about his age. Besides I'm a terrible liar...I must give off some type of pheremones or have a serious tell because people can always tell when I'm lying!!

Maybe that's been my problem at the poker table lately!