The crossword solution for the term 'Builds a Tree House' is 'Nests'. Building a tree house is a popular activity for children and adults alike. It involves constructing a structure in a tree, usually for recreational purposes. The process of building a tree house requires a variety of skills, such as carpentry, engineering, and problem solving. It also requires materials such as wood, nails, and tools. The term 'Nests' is used to describe the act of building a tree house.