I Just Forgot (A Little Critter Book) By Mercer Mayer

Little Critter is trying hard to do all the things he's supposed to do and trying hard to do them right.  But, sometimes little critters just forget!  He gets it almost right over and over, like when he remembers to take a bath, but forgets to use soap.  Kids will relate to Little Critter's forgetfulness and parents will feel like maybe their little one isn't the only one of his kind.  The entire Little Critter series is worth a look.  Full of great illustrations that kids love with lots of little details and creatures to spot.