Hi Rosalinda!
Yay! Your first time to Disney World!
First of all, this is a great time for you to be at Disney World because the International Flower & Garden Festival is happening at EPCOT. The entire park will be covered with topiaries, gardens, fun kids activities and educationl stops. It's one of my most favorite times at Epcot! You can download the
Flower & Garden Festival Guide to check out the details before you go.
As for the rest of your time there, your son is at the perfect age to love everything---so really browse through the Parks websites and find the things you know he's into (ie...does he like animals? You must do the Kilimanjaro Safari at Animal Kingdom. Is he a Woody & Buzz fan? Do Toy Story Mania at Hollywood Studios. Does he like pirates? Don't miss Pirates of the Caribbean at Magic Kingdom). And don't forget to book a Character Meal or two! It will be an experience you won't forget!
Because you are expecting (congratulations, by the way!) you will want to check out the restrictions on some of the attractions...they will all be marked in the Times Guide that you can pick up at the front of each park. However, you will not find yourself left out---there is so much to enjoy as a family. Please come back and ask if you have more questions--we're happy to help!