Let's see, I got involved in 1st grade I guess as a Tiger. Went on to get my Arrow of Light. I joined the local troop in 5th grade and am still in now in 10th grade.
Recruitment--- keep them active and have lots of fun stuff to do. Being challenging is a must as well. I'm still in because I enjoy hiking, climbing, etc. If we get rid of those things, I wont stay in the troop long. I've already been tempted to change troops b/c of the lack of outdoors stuff.