The museum here in Mesa allows you to go inside several of the planes. I've gotten lots of pictures. Of course my mind is completely blank right now and I'm not sure which big bird I was inside. So cramped! And standing next to the underside ball turret almost made me have a panic attack thinking of trying to fit inside that glass dome! Here's a few pics. I'm planning on taking a ride this fall as they offer them when the weather cools down, actually I think it doesn't start until winter.They definitely aren't very big, no. But then, they were intended essentially to transport half-squads or other small crews, like for a mortar, rather than a full squad like the 251 was.
No, museums tend to be a bit uptight about that sort of thing
That's an Sd.Kfz. 251, the bigger cousin of the 250 that Ron is buildingIt's an Ausf. D (easily recognised by the outward slope of the rear wall) and looks like a 251/1 to me, which is to say, the basic APC variant.