For our Leave No Trace Banner/Poster we decided to let the boys walk through paint with their bare feet. Let me say, the boys LOVED it! The concept behind our banner is that when you leave nothing but footprints, eventually your footprints will fade away, but what you leave behind (such as trash) will not.
The boys will be signing the poster and then we will be taking pictures on our service project tonight... a hike with a trash pick up on a frequented trail.
Also... for additional fun, be sure to check into Geocaching. It's on online "treasure hunt". I happen to know that there are "caches" on the trail, so we'll be introducing the boys to that fun activity as well!