Walk in the woods and collect natural materials - leaves, twigs, stones, sand/soil to make pictures with.
Large sheets of paper, pens, found materials eg leaves, seed pods, tree bark, twigs, stones, sand/soil
On large sheets of paper draw outlines of images eg. Scout logos, recycling logo, tree, tents and camp fire...which the children fill in with their collected items to make a picture. Talk about the environment and country code. At the end of the game return everything to the wild and recycle the paper.