My granddaughters in Australia are keen fans of the Charlie and Lola books. In their case life imitates art since they have a big brother who's just as nurturing as Charlie is!
In fact I first heard this book read to the girls by their teen-aged brother, and the experience brought a smile to my face.
Lola's impulse control is not great, and in WHOOPS! BUT IT WASN'T ME she again tries Charlie's patience -- this time by breaking his handmade, prize-winning rocket. But the details of the story aren't so important as the gentle example for little ones. Kids see that Lola is loved no matter how outrageous she is, and Charlie models patience, negotiation and resourcefulness. Nice lessons slipped in with a fun story.
Lauren Child's sweet stories and delightful illustrations charm children and adults alike. This is my favorite (so far) of the Charlie and Lola books.