Teams build large outdoor trebuchets—catapult-like siege engines—for medieval challenges, like knocking down a mock castle wall with coconuts. Children will learn to create, read and follow engineering plans. Outside, two teams will each build a large trebuchet. They'll learn engineering and construction principles and work with a variety of hand tools. Each child also assembles a take-home tabletop hurling machine, which is used in indoor play. Indoor medieval art projects and outdoor games keep everybody energized! The culmination of the week is a demonstration of the trebuchets for friends and family. The teams do all the figuring, aiming, positioning, and loading. We emphasize safety and adult supervision, so it is the lead instructor who inspects and sets the trebuchet before allowing it to be released.