It's a five foot long model of a prehistoric amphibian. He's called John. The Yorkshire Museum are selling him on ebay. If you don't live near enough to collect John, don't worry, because I do. I've measured the upstairs landing and there's room for him there.
I promise that I won't play with him until Christmas Day, and will write you a nice thank-you letter on Boxing Day. Thanks in advance for your generosity, and for enabling me to give John a home.
What John might look like on the upstairs landing.