FOR USE IN SCHOOLS AND LIBRARIES ONLY. For Henry and his big dog Mudge, summer means going on a picnic in the park, taking a bath under the garden hose, and going to the top of the big green hill.FOR USE IN SCHOOLS AND LIBRARIES ONLY. For Henry and his big dog Mudge, summer means going on a picnic in the park, taking a bath under the garden hose, and going to the top of the big green hill.