Harry thinks he's too old for his bucketful of dinosaurs, but they have
other ideas. He looked after them when he was little and now they're
determined to stick by him . . . for life. And Harry is not the only one
who's got a lot bigger! When a mysterious set of plastic dinosaur cards
appear on his key-ring, Harry soon finds that he can call on an army of
Back-Up Dinosaurs. It only takes a rub with his finger to call up some
MONSTER-sized muscle! When a big snow storm blocks the roads, the
residents of Huntingdon village are trapped. Harry and his
friends--Jack, Charlie, and Siri--want to deliver emergency supplies.
But it would take the strength of a triceratops or the enormous bulk of
an apatosaurus to help them . . .