You sure can Eileen. The Walt Disney World website offers a
calendar that will give you schedule information for park hours, special events, parades, fireworks, and operational updates (refurbishments).
There is also a website, though it's not run by Disney, that publishes the entertainment schedule for all four major theme parks, Downtown Disney, the Boardwalk resort area, and more. This one includes more detailed information and schedules for some of the shows not listed on Disney's site (like the Dream Along with Mickey show on the Castle Forecourt stage). It is updated every Saturday night. You can visit it at
http://pages.prodigy.net/stevesoares/. Do keep in mind that things are always subject to change.
Based on your question, it sounds like you are only planning to visit the Magic Kingdom. I thought I'd let you know that there is also a fantastic
Nemo Musical at the Animal Kingdom. My 4-year-old nephew loved it when we were there in September. Another option for little ones at Animal Kingdom is the
Festival of the Lion King show. It's a vibrant celebration filled with upbeat music, very talented performers, and favorite characters from the Lion King. During one part of the show select little ones are chosen to participate in a parade-like event where they shake maracas, and wave tamborines to really take part in the action. Your children might enjoy it. Just a thought.
I hope your trip is absolutely magical!