I guess you're probably looking for things to do with the younger 2 kids that the rest of the family wouldn't feel like they "missed out" if they don't get to do those things too. I'd recommend Journey into your Imagination with Figment. It's pitched to the 'younger' set...my nieces, ages 4 and 6 love it, but dd was tired of this by age 9. There is an interactive play area at the end of this. However, remember that you can walk through the ride queues with the riding members of your family, then pass through to the waiting are while the rest are riding. The waiting lines for Mission:Space and TestTrack have cute theming. At the end of M:S, where you'd wait for your riders, there is a tube-crawling area for the younger ones. At the end of TT there is a car display (yes, you can climb into the HumVee or a convertible). Attractions that ALL family members will want to see include Spaceship Earth, Living with the Land, and Maelstrom (boat ride) in Norway (but if you're at Ep in the am, WS won't be open til 11). The Living Seas is a large aquarium...not too much on the excitement scale, and definitely something you could do that the others won't feel like they've missed much.