London's Natural History Museum and Japan's Kokoro have combined to supply animatronic dinosaurs to Gondwana - Das Praehistorium in Reden, Germany.

Charged with creating completely realistic animatronic dinosaurs that could reliably work in water, Kokoro had to develop new methods to achieve this.

With the Rutiodon, an early crocodile, the tail had to half float and half sink, without putting a strain on the mechanics.

Wildlife photographer David Lazenby of Lazenby Design was the designer and art director, and it was his responsibility to make the experience believable. "We gave Kokoro a very particular brief. We didn't want random, pointless movements for the sake of it, we wanted everything to be authentic," he says.

"The animatronics were different in as much as there was a great focus on subtle movements, such as the T-Rex's head vibrating when he roared. We also wanted more detailing on the skin and the structure of the skin."