I took my dd5 to Disney World last March, she enjoyed the trip but got very tired and just not as interested in the parks as I hoped she would be. I am planning another trip in Aug. 06 she will be 7, do you think she will enjoy the parks more this time or should I wait to go in another year or two when she is older? One of the reasons she may have gotten tired easily is because the parks were extremely busy it was a two hour wait on most of the rides in MK and any park when we were there on our spring break last year. I know I enjoyed the parks more that she did even though I did not see alot of Ebcot which is the one park I cant wait to go through slowly. 

You need to spend more time here on the DIS before you go back! You'll learn to get to the parks early, use Fastpass as much as possible, and plan your days according to EMH, etc. Once you've got it down, then take your family back - they'll be amazed at the difference a lot of planning can do!