Spontaneity marks both the text and illustrations of this short and happy story. David decides to build a treehouse, a private place to house his moments of disgust. These arise most frequently when Elizabeth or Little John either challenge his directives in their play, or stop to wrangle, or combine to tease him. A big ree on a small island in a salt water river is selected and the work begun. Mr. Addlehorn, a helpful old party, lends an occasional hand. When a terrific storm strikes, the children worry about him and their nearly completed treehouse in that order until they discover the first inside the second, a contented survivor of the story. The easy vocabulary and the pleasant illustrations should strike the fancy of the youngest readers in this age group.