By Dav Pilkey
The one where Dog Man's own author hands the children the pencil and shows them how to make their own comics.
Li'l Petey and Flippy the cyborg fish start a comic-making club, and their twenty-one squabbling baby frogs each try to draw their own story. The frogs argue, get stuck, decide they're no good at it, and slowly figure it out — and the comics they make fill the book, in clay, in watercolor, in flip-o-rama and photos.
This is the same author as Dog Man, so the humor lands in exactly the same spot, but here's the extra thing it does: it shows your child how comics get made. The story keeps stopping so the frogs can try clay animation, or a poem, or a photo comic, and a child who's been copying Dog Man drawings will suddenly want to make their own. It turns a reader into a maker, which is a very good problem to have on a rainy afternoon.