Mookie wanted to act out the classic scenes from Go, Dog. Go! in which one dog asks another if he likes her hat and he says no. (I’m assuming traditional gender roles, here, but maybe I underestimate P. D. Eastman.) M. wanted to put on a fancy hat for the final scene, where (spoiler alert) he finally does like it. The above is the result. She put on a scarf, then a hat, then this blanket, making a kind of hat-trick hat.