The Space Center is about an hour east of Orlando and the beaches are about an hour away as well. It just depends on if you want to go to the Atlantic or the Gulf. The tolls to get to the Space Center is, i think, about 6 dollars roundtrip, which is the easiest way to get there.
If you want to get to the beaches on the Gulf, you just have to take I-4 all the way to Tampa/Clearwater.
You can dream, create, design and build the most wonderful place in the world, but it requires people to make the dream a reality" - Walt Disney