DD4's favorite things from our last trip (according to her)
At MK- Slash Mountain, Thunder Mountain, Peter Pan, Pooh Bear ride, Small World, Dumbo
(avoid Snow White)
At AK- The safari, Kali, Maharajah Jungle Trek
(avoid ITTBAB)
At Epcot- Test Track, Soarin, Nemo ride, masks at Kidcot stops in WS, ride in Mexico
Studios- Playhouse Disney characters, HSM Pep Rally
She loved meeting the characters at all the parks.
Favorite meals- Crystal Palace, Chef Mickey's, Cinderalla's Gala Feast
Of course, all kids are different. My daughter loves the milder thrill rides.
My advice: start slow and see how they react to the milder rides before moving on up to the bigger rides. Same is true of the characters, if they are shy, stick to ones they know before approaching any unusual characters.