A catapult is a simple machine that uses stored energy to launch objects over a distance. It works by using a lever arm that is pulled back and then released, sending the projectile flying through the air. Catapults have been used throughout history, especially in warfare, to hurl stones or other projectiles at enemy fortifications. Today, catapults are often seen in science experiments and educational settings, where they help teach principles of physics like force and motion. They can also be found in fun activities, such as launching marshmallows or small toys, making them a favorite among kids and adults alike.