There is the obvious stuff in Orlando like Universal, Disney, Sea Worldetc
A few other considerations:
- Florida Carriage Museum (20 minutes)
- Renninger's Antique Mall and Flea Market in Mt Dora (30 minutes)
- there are several interesting things to do in Tarpon Springs (1.5 hours away) including sponge diving, fishing, etc.
- manatees around Crystal River (1 hr)
- Daytona Speedway and Daytona Beach (1.75 hrs)
- Cypress Gardens (1.75 hrs)
- a different way to see the Orlando area is in a hot air balloon, for example
- Silver Springs in Ocala
- Don Garlits Museum of Drag Racing near Ocala
If you are interested in aviation:
If you are interested war birds: