Mercer Mayer has been writing Little Critter books since the grown-up children were sleeping in cribs. My kids loved the series and had me read it to them hundreds of times Little Critter is a hedgehog-looking animal who very small children can easily relate to as he goes about his simple adventures. Each of the over 200 books featuring Little Critter tells a very simple story providing positive reinforcement for very small kids who sometimes need to be told how competent and good they are, even if they sometimes get things wrong. All the books are whimsically illustrated and quite funny in a gentle and child-like manner. These are very simple books without any hard words and are very appropriate for little ones starting at about one year old.
