A brief sequence shows a model Tyrannosaurus Rex dinosaur in stop motion footage (Ray Harryhausen?) eating the flesh of a dead dinosaur.
Several shots show model maker Arthur Hayward at home, working on a drawing and paper skeleton of a dinosaur, then winding a plaster of Paris bandage around a wire dino shape under the watchful eye of a model Diplodocus. Finished heads of other models are seen. We then see Arthur covering a Diplodocus shape with grey plasticine and marking creases into the 'skin'; great shot of his enlarged eye looking through a magnifying glass. Commentator says Arthur works at the Natural History Museum and his models are used in films such as 'One Million Years BC'.
Arthur takes another Diplodocus (or could be the same one) from a plaster mould, then places a rubber dino skeleton into the same mould and pours pink latex rubber (whisked in a kitchen mixer) in through a hole. Arthur shows how the arms and mouths of the finished models can move, due to their jointed skeletons. A little tableau shows a Tyrannosaurus Rex growling with moving mouth and a Stegosaurus eating grass.
Another stop motion sequence shows a Diplodocus pushing a double decker bus along with it's head and pulling up a tree outside Westminster Abbey - yikes!