Hi LaDonna!
Thank you for visiting the Moms Panel!
Every Walt Disney World theme park would be a great place to visit on July 4th. The busiest park is usually Magic Kingdom park - I would recommend you arrive early, and be prepared for big crowds, all wishing to celebrate on that day!
At Magic Kingdom, there are special fireworks at 9.00pm - Disney's Celebrate America.
At Disney's Hollywood Studios, the Special July 4th Fireworks Presentation starts at 9.45pm.
At Epcot, IllumiNations: Reflections of Earth starts at 10.00pm.
There are no fireworks at Disney's Animal Kingdom.
You may wish to check the calendar for each theme park:
Magic Kingdom Epcot Hollywood Studios Animal Kingdom
If you have any other questions, please come back and ask me - I would be happy to help you plan your magical vacation!