C.,
I bet you cannot wait to go! Autograph books for sure and you can get them on eBay sometimes cheaper than at the park. I have made little backpacks for the kids with the autograph books, a pen, a lanyard with a few pins (also off eBay), things to do on plane and/or car like coloring books (all Disney based), crayons, some snacks like small bags of gram crackers, fruit roll-ups, etc. We also try to stop at the Disney Outlet near the park, which has park merchandise cheaper than at the parks along with pins, water bottles, etc.
I also have a spreadsheet I did for my boss when she took her then 4 year old telling her which attractions where the best for her and what would be good to do at the parks. I would be happy to send it to you if you would like it. We have also used the Disney Florist to send “gift/surprises” to the room and the kids (and adults) have always gotten a kick out of them and the surprise of them being there when you get to your room or when you return to your room the first night! Right now I am planning something for our youngest son who is getting engaged at Walt Disney World in a few weeks and I called the florist the other day to see what I could send to the room Winnie the Pooh related as she loves Pooh! Also this is her very first visit to Disney so I have made her a backpack, lanyard, and an autograph book too! We cannot wait to see her expressions when we first take her through the Magic Kingdom, it is always fun to watch, whether they are 2 or 28. You can also send your own package, if you are going next month, as we are, we are sending a pre-decorated Christmas tree for our room with a label to return it back home when we check out, so you can send anything to yourself at the hotel.
As for dinning, we love the Liberty Tree in the Magic Kingdom, they serve family style and have turkey, ham, mac & cheese and potatoes. We have never had a bad meal there and it is break from moving around the park. I do agree with some of the other moms who mention that you might want to go to one of the other parks as the do offer things for children of all ages!