OP I hope you all get excited about the planning and have a fab, and well deserved, time at Disney next year.
We have been a fair few times with DC the ages of yours. Some suggestions - find out how far out booking times are for any meals or other Disney events and get on the phone pronto - remember the time difference - as some sell out in minutes.
Some suggestions
Hollywood Studios - Phantasmic (Show on a lake, special effects, fireworks, great music) can combine with a meal (Mama Melrose is great) to ensure entry without queueing.
Epcot - Soaring (get fast pass first thing in the morning), Test Track, Mission Space (two levels of intensity), Living Seas
Meals - the countries are good: France, Mexico, Canada, Japan (Teppanyaki restaurant)
Magic Kingdom - Night time parade I think is better than daytime. Wishes Fireworks - stand at station end of Main Street.
Animal Kingdom - Everest, Bug's Life, Safari - There is also a walking safari that you can book separately (expensive but we enjoyed it)
Restaurants we have enjoyed
Breakfast - Character at 1900 Park Fare Grand Floridian, Chef Mickey's Contemporary, Character at Yacht and Beach Cape May Cafe
Lunch - to be honest we just have a light snack (not the turkey leg they seem to eat like a chicken drumstick), Earl of Sandwich Downtown Disney
Dinner - Jiko (Animal Kingdom Lodge), 1900 Park Fare, Brown Derby (Hollywood Studios), Narcoosees at Grand Floridian
Discovery Cove - a must - well worth the money.
Universal - Hogwarts Ride - need to use locker.
Kennedy Space Centre
Both Disney Water Parks are great fun and make a change from the Parks