S.L.
my oldest has been in it since kindy and is now in 5th grade. (we don't know if he'll do boy scouts yet next year.) he's made great friends, grown socially, learned survival skills that are important...i could go on and on! i like the fact that you can be as involved as you want or as little involved as you want. you don't have to go to every event or be a den leader if you don't want to. and the kids still get a great experience. i had a psychiatrist once tell me it was hands down one of the best thing for a boy to do for social skills.
edited to add: you can technically start the summer between kindy and 1st grade, so that's why i call it kindy.