Hi Laurie,
Thanks for stopping by with your question. I completely understand your dilemma, but considering your kids' ages, I would recommend going to Disney's Animal Kingdom. While Disney's Hollywood Studios does have the Disney Junior - Live on Stage show, many of the other attractions and rides might not appeal to kids that young.
Disney's Animal Kingdom is full of great options for kids that age. My young kids absolutely love Rafiki's Planet Watch with the
Affection Section.
Kilimanjaro Safaris was my oldest son's very first ride at Walt Disney World when he was almost 4 and I will never forget his excitement and glee at seeing all the animals on the ride. One of my youngest son's favorite rides last summer was Triceratop Spin and playing in the
Boneyard (which also gave me and my husband a chance to take a break and sit for a bit) in DinoLand, USA. Be sure to see the
Finding Nemo - The Musical, a theatrical show with amazing puppetry!
If you'd like to have a great breakfast and meet some characters, too, I would suggest booking
Tusker House. The buffet is great and full of delicious options and seeing Mickey, Donald and friends in their Safari best will create some lasting memories and a fun start to your day.
I hope I was able to offer some insight to help you make a decision that is best for your family.
Have a magical trip!
~Allison L