Benjamin Bear in Fuzzy Thinking by Philippe Coudray. Although he is a very serious bear, Benjamin Bear has a funny way of doing things, like drying dishes on a rabbit's back or sharing his sweater without taking it off.
Kid overfills tub, makes mess, learns not to fill the tub that full anymore. I always like books that teach concepts/morals, such as you only fill the tub to a certain point. They gotta learn it somewhere! (By Tedd Arnold).