Hi There!
Wish my son would have gotten on these boards before our last trip and asked this!! You are planning your WDW visit and thinking ahead, which is great!!!
My son is 13, and for the first time this trip, I did take him to Disney Quest in DTD. We got less expensive tickets through Ticketmania, and went during the day on a Friday! It was awesome!! My son loved the CyberCoaster and the Virtual video games, and I did some, too. The PoC one and Aladdin are great, and we had few lines. I think it starts to get crowded at night.The food there is good, too. My son had nachos.
Now - this is the problem with parents. This was our 6th trip. We have seen lots of the parks and DS loves RnRC, ToT, SM, BTM and he still has not been to Universal Studios. It took a long time for me to feel I wanted to spend the time and money for Disney Quest. It may or may not be a priority for the family trip. Maybe you could split up one day and go. It was well worth it, but I needed to get all my resort and park time in before we tried DQ.
Good luck and enjoy the trip!
melomouse