[Valentin] is the MacGyver of model rocketry, building a small rocket out of three items many people have hanging around the house. Cat litter, matchsticks, and a ballpoint pen are the raw ...

Building and flying model rockets is great fun. Eventually, though, the thrill of the fire and smoke subsides, and you want to know more about what it’s doing in the air. With a thirst for ...

Take Estes Rockets, based in Penrose, Colorado. The company got its start during the space race in the 1950s. It’s now the country’s biggest manufacturer of model rockets for hobbyists.