Welcome to a Jurassic swamp with dragons in the deeps and dinosaurs hiding in the grass. A child sits watching with open-eyed wonder. It’s the stuff of children’s fiction. But it’s real and better than any made up story or computer game. There are things going on in that garden mini pond that are guaranteed to catch the imagination of any child. Not least our granddaughter. Then all of a sudden, as if from nowhere, out crawls a monster breathing fire and looking fierce. What prehistoric creature is this?