Harry thinks he's too old for his bucketful of dinosaurs, but he's wrong. He can still call on their help, however he's not the only one who's grown up . . .
Harry has a pocketful of dinosaurs now. On his key-ring is a complete set of plastic B.U.Ds - Back-Up Dinosaurs. If he really needs help he can run his finger along a B.U.D. head-to-tail and it will arrive - life-sized! When a big snow storm arrives and blocks the roads, the neighbouring village of Huntingdon is trapped. Harry and his friends - Jack, Charlie and Siri - want to deliver emergency supplies, and they need the kind of help that a triceratops and an apatosaurus would be perfect for . . .