Dear Andrea,
Thanks for stopping by to say hi here at the Disney Parks Moms Panel! I'll be happy to assist you with your question!
The great news is that there are plenty of attractions that will allow one of you to take one of the kids and the other to take the other two. In the
Magic Kingdom alone, a few rides that I can think of off of the top of my head are Dumbo the Flying Elephant, The Magic Carpets of Aladdin, Splash Mountain, The Barnstormer, Big Thunder Mountain Railroad, and many others!
Of course, these all will depend on your children's heights being sufficient to ride each individual ride. They will have to meet the minimum requirement for each ride no matter how many people intend to ride with them.
If there are any rides that you or your husband want to ride but that the kids cannot go on, you can use
Rider Switch, in which one of you rides while the other waits with the kids, and then you swap without having to wait in the line again!
Hope that helps with your magical planning!
- Jan K.