Boar's Treehouse: Book 6 - Hardcoverby Gus Gee (Author), Cindy Gee (Illustrator) Mom shooed Boar, Junior, and Hardy out of the house and told them to play outside. As the kids wandered around the backyard, they spotted a big tree. The kids thought it would be cool to build a treehouse on it. But how? They needed to discover a way to communicate with each other. You will laugh as you watch the kids figure out how to build their treehouse. Number of Pages: 38 Dimensions: 0. 25 x 8. 5 x 8.