Check out the CAP. Civil Air Patrol.
I can't remember the starting age, but goes all the way through High School.
If you can find a good active squadron in your area, that has a good ground search and rescue team, there are a lot of good learning opportunities.
I was a ground team commander for a few years.
The kids learn things such as, map and compass use, ground navigation, basic survival skills, basic military command structure and function, ground to air signaling, radio communications, basic first aid and cpr, crash site security, etc...
The purpose of the ground team in CAP is to conduct a ground search (and if appropriate) rescue in the event of an airplane crash in their area of operations.
Also, If they are so inclined, and stay with it (and progress) they can learn to fly, and get a head start on an officers position in the USAF after high school.
May not be your (or their) cup of tea but it might be something to think about.
MIKE