Hi Andreina,
Thank you so much for visiting the Disney Parks Moms Panel with your question. I am happy to help you plan your magical vacation!
I truly find that there is something for everyone at every Disney theme park. I suggest that you watch the
Walt Disney World planning video online, and have your 9-year-old watch it as well. This way, you can both start to see which Disney theme parks are the most appealing to you.
That said, if I was planning for a trip with these aged children, I would first suggest that you visit
Magic Kingdom. It is the park that most people think of when they think of Walt Disney World, with the iconic Cinderella Castle at its heart. Here, your baby will wonder at attractions such as it's a small world and Dumbo the Flying Elephant, while your older child will not only enjoy those attractions, but also the more thrilling ones such as Big Thunder Mountain Railroad and Space Mountain. Another theme park I would suggest for both children is
Disney's Animal Kingdom Theme Park. Here, everyone can enjoy attractions together such as a ride on Kilimanjaro Safaris to see exotic animals, as well as amazing stage shows such as the Festival of the Lion King, featuring dazzling acrobats and wonderful music.
If, after watching the planning video, you find that your older child or you are really excited about Disney's Hollywood Studios or Epcot, absolutely go for it! There will be something for your little one at every Disney theme park.
I hope that these thoughts are helpful for you, Andreina. Have a great time planning your magical vacations, and please do let us know if you have any further questions.