Model rocketry is a hobby that involves building and launching small rockets. These rockets are typically made from lightweight materials like plastic and cardboard, and they use solid rocket engines for propulsion. Enthusiasts can design their own rockets or purchase kits that include all necessary components. Launching a model rocket is a fun and educational experience. It teaches principles of aerodynamics, physics, and engineering. Safety is important, so hobbyists follow guidelines and launch rockets in open areas away from people and structures. After launch, rockets usually descend with a parachute for recovery.