I'm so glad she's liking them! There is so much great children's literature out there - the trick is just to find it. These really have gentle humor that goes over so well. Wait until you get to the story where Oliver's Mama gets them dressed to go outside and play in the snow. (I don't remember if it's in the book you have or a later one.) Absolutely pitch perfect.
She won't be able to read them herself yet, but you might want to try Milly Molly Mandy for readalouds. My DD adored those at her age.
