Hi, Jemilla,
Thanks for bringing this question to the Disney Parks Moms Panel. Your son is going to have such a magical birthday at
Walt Disney World Resort!
I have a lot of experience leaving and reentering the theme parks with my three little ones, so I'm happy to help answer your question. My family's general game plan is to visit our theme park of choice early in the morning, head back to our Resort hotel for an afternoon break and then reenter the same theme park for some evening fun. I'm happy to tell you that you will not experience any problems doing this, regardless of whether you are staying on-property or off-property.
The purchase of a basic theme park admission ticket allows you to enter a theme park, leave and reenter that same theme park with no additional charge. That means you will certainly be able to visit
Epcot in the morning, leave in the afternoon and return in the evening with no problem at all. Hooray!
I hope this helps with your planning, Jemilla. Please let me know if I can help answer any other questions about your upcoming vacation to Walt Disney World Resort.
Wishing you magical memories to last a lifetime,
Erin