I recently did this beautiful workshop at a local home ed camp.
Using 5 pieces of wood, make a star shape. Then give the children a basket to fill with wild flowers or leaves, then ask them to fill in the gaps following a pattern. In the evening fill with a tea light.
For the barefoot trail, use long sticks to edge the path. Using wild gathered flowers and plants stones, bark, flowers etc, make sections for the children to walk over. Its even more fun when you tell them to close Thier eyes and sense thier way.