This document provides an overview of hot air balloons and their history and uses. It discusses some of the earliest balloons in the late 18th century and their use in military aviation. It also outlines records set by balloons, such as the first transatlantic and transpacific crossings and the first around the world flight. The document notes that balloons are now used for activities like astronomy research, logging, recreation, and weather forecasting. It includes examples of how balloons can be integrated into math, art, and writing lessons. It concludes by providing instructions for how to make a simple hot air balloon model.