One of my boys’ absolute favorite hobbies is building and launching model rockets. I know… it sounds potentially dangerous and impractical, but, really truly, it’s very doable and safer than you would think. I recommend Estes rockets which can be found on their website, Amazon, or in hobby stores such as Hobby Lobby. Rockets vary in size and cost. Aside from the rocket itself, you’ll need to buy a motor and a launch pad. Motors are single-use only, but the launch pad and actual rocket can be used for years to come. It has become something of a family tradition for us to have a launching party every summer. Girls would enjoy building a rocket as well!!!