Hello Angel!
Welcome to planDisney! My husband and kids are planning on visiting the Parks in the future without me (how dare they!) and we are trying to figure out which attractions he can ride with our kids. They are not as young as yours but they are not yet ready to leave our side. I am glad to help you answer this as it is also needed research for me! Now, any theater or show-like attraction is not included as you will fit next to each other. Also, it is at the Cast Members' discretion if there is an issue with the three of you fitting together. When searching through the
list of attractions, I reduced the height to 38 inches to avoid including anything your little ones may not be able to ride. If your kids are taller please adjust the scale.
Magic Kingdom ParkPeter Pan's Flight
Haunted Mansion
Pirates of the Caribbean
Buzz Lightyear Space Ranger Spin (Most likely Mom will not get a controller.)
Jungle Cruise
Haunted Mansion
"it's a small world"
Mad Tea Party
The Many Adventures of Winnie the Pooh
Tomorrowland Transit Authority PeopleMover
Under the Sea - Journey of The Little Mermaid
Walt Disney World Railroad
The below are attractions where it may be a tight squeeze but you can ride in the same vehicle behind one another.
The Magic Carpets of Aladdin
Dumbo the Flying Elephant
EPCOTFrozen Ever After
Living with the Land
The Seas with Nemo & Friends
Spaceship Earth (maybe a little tight)
Gran Fiesta Tour Starring The Three Caballeros
Journey Into Imagination With Figment
Remy's Ratatouille Adventure
Disney's Hollywood StudiosToy Story Mania! (Only two controllers!)
Alien Swirling Saucers
Mickey & Minnie's Runaway Railway
Disney's Animal Kingdom Theme ParkKilimanjaro Safaris
Kali River Rapids
Na'vi River Journey
As I typed out this list, I was impressed by how many attractions could fit your family. I love that you three will be able to experience so much together!
If you have any more questions please
let me know! My list may not be perfect but I think it's pretty darn good and I hope it helps.
Happy Planning!
-Nimmy