This is one that our Penguin children's rep (who has the most delightful Irish accent) RAVED about. She said, "Seriously: you just have to read it. It's hilarious!" I put it off for a while, until she came again (there's a sequel coming out), and reminded me: "You HAVE to read this." So, I did. And she's right: you have to read it. It's hilarious.
It's the last day of summer, and Mr. Pants -- a cat with two cat sisters and a human mom. No, I don't understand, either -- wants to go play laser tag. Except his younger sisters -- Foot Foot and Grommy -- have other ideas. Foot Foot wants to play with her new toy. Grommy wants to go to the Fairy Princess Dream Factory. Mom has to go shopping. The deal is this: Mr. Pants goes along with all this stuff (he doesn't want to do, obviously), and they can go play laser tag.
Much like Babymouse, this is a gold mine for hilarity. There's also some gender-bending going on; Mr. Pants is your typical "boy", but he's also accepting of his sisters' likes. (Which, I think, is typical for a boy with sisters. Ask me, sometime, about the summer I was into Little House on the Prairie. I was Laura, and my brother was Mary.) It's everything a beginning chapter book needs to be: colorful, funny, interesting, and good.