When I was a kid, Airfix branched out from their core business of plastic model kits to make airplanes to a variety of things to appeal to children. I made a T Rex. I thought I might have misremembered this, but a quick search shows you can still buy the kit I used (though Airfix have gone back to their core business).
I have a horrible feeling that the Tyrannosaurus rex I made is now in landfill. Like most of them.