Harry and the Bucketful of Dinosaurs by Ian Whybrow and Adrian Reynolds

After a rummage through his grandma’s attic, Harry discovers a forgotten and neglected box of toy dinosaurs which he lovingly restores and places into his bucket for safekeeping. After discovering the names of each creature in his collection, Harry starts to address them by name and a unique friendship results. But when he accidentally leaves his bucketful of dinosaurs on a train, Harry is distraught. Will he ever be reunited with his scaly friends?