EPCOT has been DD's (7) absolute favorite park other than MK since she was 2. When she was 2, we spent one day there from open to close and realized we did not have enough time. Since then, we spend 2 days there every year. When she was little she would have ridden the Donald Duck boat ride inside the Mexico Pavillion in circles all day if we let her. There are a ton of characters in World Showcase (a lot of Princesses) and several characters in Future World as well. There are also entertainers all throughout World Showcase. There is Nemo and the Aquarium after it, Turtle Talk with Crush, Journey into Imagination and the play area after it. If your older DD wants to ride Mission Space, they have an inside playground area where the little one can wait. Don't underestimate how much little kids like The Land ride. DD was tall enough for Soarin and Test Track at age 3. She loves Soarin. There are the kidcot stations, and you can also buy passports if you want and at the kidcot stations they will be stamped from each country. If you want to spend the money, the Pick a Pearl in Japan is a really need experience because they do a little cermony and make a fuss. If your younger one likes Phineas and Ferb at all, she may love following your older one arounddoing the Perry missions. I don't know where you are planning to eat, but DD ranks Biergarten right up there with Princess meals. It has a German Band and a dance floor and kids go out and dance when the band plays. My DD was even really impressed with the movies in the countries at that age- especially China where the movie is all around you. There is ton to do there.
