Well Done, Noddy! by Enid Blyton

In Toyland, a spate of robberies leads a small taxi-driving wooden boy to be wrongly suspected. Determined to clear his name, he follows clues with help from friends like Big-Ears, Tessie Bear, and Bumpy Dog, outwits the goblin thieves Sly and Gobbo, restores the stolen goods, and earns the policeman's praise.