Just a little plug for 4-H! Do you think of agriculture when you think of 4-H? Well, that IS one aspect of it, but there are far more! My kids have been involved in projects such as robotics, photography, poultry, rabbits, community service, shooting sports, knitting, sewing, and so much more!
If you're interested in finding a club near you, just call your county's cooperative extension and they'll hook you up with a club in your community (or you could just google it too!)
We highly recommend 4-H, not only for the projects, but also for the experiences the youth gain, such as public speaking, presentations, mentoring, community service, and more!