Can't See The Forest For The Treefort - S1.E21

Rusty McCabe has built a secret clubhouse that he won't let Ned in, so in response, he makes his own secret club in a tree fort. Newton wants to help, though, so they end up building an enormous, five-star clubhouse in the tree, and it becomes the most popular club in town. Rusty begs to be let in, but when Ned lets him in, he accidentally causes the clubhouse to collapse.