there is so much to see and do. your little ones might tire easily and you might want to break it up over two days.
when you consider the parades, meeting with the characters, rides, shows, character dining, you can easily spend two days at the magic kingdom.
there is something for every age group at every park, so if there is a park that you would like to visit there will definitely be something for your little ones to enjoy as well!!!
i hope this helps in your decision. if you have any other questions, please let me know. 