Hi there, Andrea!
With a 3 year old in tow, my immediate recommendation would be for a resort on the Walt Disney World monorail loop. For ease of transportation and location, in my opinion, that is the place to be. Take a look at the many different room categories at Disney's Grand Floridian Resort & Spa and Disney's Contemporary Resort. You will easily be transported to Magic Kingdom Park and Epcot Theme Park via the monorail. There are even boats and walkways involved, if you choose. For example, you can take a quick stroll from Magic Kingdom to the Contemporary. And, the GrandFloridian is also a charming boat ride away from the Magic Kingdom. Take a look at the current
Walt Disney World Special Offers. If you do not find something that fits within your budget based on my recommendations, take a look at all of the other Disney Resorts on property. I assure you that you will be pleased with the transportation that Disney provides to all guests of Walt Disney World Resorts.
Feel free to come back and ask any additional questions you might have as you begin to make your decisions. We are always happy to help.
Until then, I wish you a truly magical vacation!
-Jacqui