Hi Christina,
Thank you so much for visiting the Disney Parks Moms Panel with your question.
How exciting to be celebrating your birthday at
Magic Kingdom! Do be sure to pick up a complimentary "Happy Birthday" button to wear on your birthday. Sometimes, a little extra magic happens for guests wearing a Happy Birthday button. My husband was offered many birthday cupcakes when he wore a happy birthday button all day at Walt Disney World! Although this kind of pixie dust is not guaranteed, it is also nice to hear cast members and other guests alike wishing you a happy day!
I love your first day plan.
Disney's Art of Animation Resort is a fun and whimsical resort at which to spend your birthday vacation. Heading to
Epcot for a meal and a ride on Test Track sounds like a great way to start your vacation. To do this, you will need to have theme park admission for the day. I am afraid there is not "another way." Perhaps you can add a few more attractions or a stroll around World Showcase to make your day at Epcot longer.
I hope that these thoughts are helpful for you, Christina! Have a great time planning your magical vacation, and please do let us know if you have any further questions.