Planning a trip with 2 little Mouseketeers is a lot of work, but it will be worth it to enjoy the magic through their eyes!
I remember taking my kids when my daughter was 3 and my son was 8 months old. Here are some tips I can give you as I look back at how I traveled:
-Bring a double stroller with plenty of storage/basket space
-Each day to the parks, have a bag packed with diapers, snacks, crackers, extra clothes, sunscreen, hats, sunglasses, camera, autograph book, and lightweight blankets
-When entering the parks, locate the Baby Care Centers for changings and feedings
-Stay on your little ones' schedules as much as possible. This means mid-day breaks for naps and early bedtimes (I know this one is tough, but late nights just won't work with small children.)
-Plan mealtimes and make some character dining reservations
-Bring rain ponchos and umbrellas for any expected (or unexpected!) rain
-Check Weather.com a few days before you leave home to pack accordingly
-If traveling with another adult, use Rider Swap so everyone can enjoy the attractions. Read about that and other helpful tips
HERE.
I hope this helps! If you need specific information, just let me know. Have a great time and take lots of pictures of your magical Walt Disney World vacation!