But you can come pretty darn close.
The smaller theropod dinosaurs were done by people in costume.
The larger ones had a base platform that moved with them and I presume several people were inside to control the mechanisms.
Nathan loved it and even Alex was entertained (although he got bored during the talky science-y bits). The show was a little loud (the T-Rex roars shook the seats) but the boys both did well with it.
It gets my recommendation for a good family night out.