A stompingly funny story with hidden dinosaurs on every page

Can you find them all? There are hidden clues everywhere in this funny, lively picture book about a little boy who suspects his sweet, elderly neighbour is secretly keeping an amazing array of dinosaurs in her house. The boy tries to tell his parents about the claws, jaws and prehistoric roars coming from next door, but they just won't believe him. Mrs Shaw from Number 84 does NOT have any dinosaurs, of that they're sure . . . But are they right? Or does Mrs Shaw actually have a T-rex putting up fairy lights in her garden?