We did our first LNT unit at our Cub Scout meeting tonite.
I took a Topo! map and added a bunch of campsites, and asked the kids to rate whether each campsite was low impact or high impact or otherwise good/bad based on its proximity to streams, trails, meadows, swamps, forests, hillsides, etc.
They had a ton of fun with it. They are 8 year olds (Bear Scouts).
We also did this neat game where we arranged all the kids in a circle and gave each kid an index card (hole punched with a BackpackingLight.com UrsaLite Carabiner through the hole << shameless advertising to our nations youth) with a component of our local ecosystem on it: grizzly bear, field mouse, meadow grass, huckleberry, cutthroat trout, elk, moose, swamp, coyote, wolf, human, etc. The first boy (e.g., huckleberry) was asked to define his relationship to any other component (e.g., chose 'grizzly bear' because bears eat berries). So a string (AirCore Pro UrsaLite Cord << more shameless advertising) was clipped from the huckle berry boy to the grizzly bear boy. Then the grizzly bear boy defined the next relationship: cutthroat trout (because bears eat trout). And the cord was clipped to the trout boy. And so on, until a neat web of interconnected AirCore links was made in the circle of boys. The emphasis was this: each component of the ecosystem was integral to the health of the web. I then had the boys holding the bear, wolf, and whitebark pine nut cards drop their cards to the floor. Result: the web collapsed. Moral: every component is important to the ecosystem as a whole. Lesson learned w.r.t. LNT: respect the ecosystem components while your in the wilderness enjoying them by following appropriate game harvesting and low impact laws. It didn't all click for these 8-year olds til the very end. It was really cool.
Aside: we also did a tent pitching contest, using the Big Sky Products' 1P2V. One of our patrols completed the pitch from stuff sack to person-zipped-in-tent in about 2 minutes - without talking!