This is a great place to learn about aerospace and rocketry.  You can build a rocket and enter it at the county and state fair.  A lot of counties have a rocket launch during their local Achievement Days.  The youth really enjoy watching their rocket actually fly. We usually use Estes rockets, which can be ordered through Amazon or on the Estes Rocket website.  Please take a look at the difficulty levels for each rocket.  The idea is that youth with increase the difficulty of the rocket built each year. There is also a curriculum available to order on the shop4h.org website.