That sounds fantastic, Trev. Good on those kids for doing something like this - definitely not from the average crop of gameboy kiddies. Having a build-day coming up in September, it might be a good idea to bring up some of our big-boy toys along for them to give a try out after the work is done as a reward, if they should be around and about on that day.
Two videos of this field
April 2012 - been posted before.
AprilAirsoft.avi - YouTube
May 2012 - been posted in private forum, but i haven't seen it shown elsewhere yet. If that was by design, let me know, and i'll remove the link.
Airsoft_May5.avi - YouTube