Hello again, Allison! I'm so excited for you and your family to make your way to Orlando in just a few short weeks! I hope my last answer helped you get even more excited for your vacation, and this answer will get you feeling like a pro before we're through!
Now, since it's only a few weeks until your trip, availability at the Disney Resort Collection hotels on the Resort Monorail Line (my usual suggestion for convenience) may have availability issues. I checked for your arrival date and unfortunately wasn't able to see any availability for Disney's Grand Floridian Resort and Spa, Disney's Contemporary Resort, or Disney's Polynesian Village Resort.
But don't despair! I'm happy to report that as of this writing, there is availability at some other great options! Since you'll mainly be on your toddler's schedule, from a convenience standpoint, I would suggest either Disney's Wilderness Lodge or The Cabins (or Campsites) at Disney's Fort Wilderness Resort! Each of these options offers water transportation to Magic Kingdom Park and are located in the Magic Kingdom Resort Area! You can't go wrong with any of them, but I'd be sure to check out the Cabins - they're unlike any other resort option around and are particularly great if your party is larger - they sleep up to six!
When it comes to must-dos at Magic Kingdom Park, you could ask 100 people and get 100 different answers, but since you've got me, the first must-do isn't about an attraction at all: it's about making sure you make a Park Pass Reservation the dates you plan to visit! Once you purchase your tickets, you'll follow the step-by-step instructions to determine which days you'd like to visit the parks (based on your ticket). This is a very important step, so don't miss it!
With that out of the way, the in-park must-dos will vary based on your little one's personality, but if you ask me, no trip to Magic Kingdom park is complete without experiencing "it's a Small World," Peter Pan's Flight, Walt Disney's Carousel of Progress, and Tomorrow Transit Authority People Mover - but you'll be happy to hear that Walt Disney World has over 100 rides and attractions with no height requirement, meaning that anyone, at any age, is welcome to ride! You can even filter these on the website! Beyond rides, be sure to take in a parade or two, and don't miss the opportunity to meet characters, or to let off some energy in a play area at Storybook Circus!
When it comes to your resort, I definitely suggest getting an early start each day, so you can pop back for a nap, to avoid the crowds, and to experience your resort's amenities! Assuming you select either Wilderness Lodge or Fort Wilderness, you'll have a beautifully wooded setting and incredible recreation options, too!
Whew, that's a lot to take in Allison, but I hope that helps you narrow down your own list of must-dos for your upcoming trip! This should get you started, but as you continue planning, please drop me another line if you have any other questions - we're always here at planDisney!
TTFN, Ta Ta for Now!
Andrew