go online and research because yes there are tons of things to do ....due to the age of your kids I would suggest focusing on the magic kingdom..... you can book lunch or dinner with the characters, sign up for a princess thing (tea party I think) at the castle for your daughter. decide how many days you are going to be at the park and you can get multi day passes and also park hopper passes if you want to go to one or more of the other parks....theres MGM, animal kingdom, and epcot. theres also down town Disney and I have also heard theres under ground Disney.....take the kids on its a small world and buzz lightyear will be a huge hit for your son... take a trip on the monorail..and buy the fast pass its worth it especially if its a busy time of year..friends of mine went to Disney last year and they also visited LEGOLAND and said it was terrific. there is also seaworld. Disney also has a few waterparks the one I remember is typhoon lagoon. but go online and do lots of research....its mind bending how much there is too do.....have fun