how tall do you have to be to get in

Height is not the criteria at all to visit this place

I don't think you have any restrictions there regarding how tall you are

Over 4 feet, just so they know you can't sneek under railings.

My kids were under 4 feet and were not allowed to go on the tour. They could go to the free museum and interactive exhibit area though.

4 Feet. Kids have glass view areas at the end of walk ways to view the plane assembly.

4 feet.

4feet and above

48 inches