Me and my daughter just came back from a forest outside the town where we live in Sweden. Quite an exciting place for her. One of the trails is for children, the whole path is marked with witch heads and trolls. You basically walk for a few minutes, find a small troll figure made of wood indicating the correct way, then continue walking further until the next sign. In total, we probably spent 40 minutes on the trail. My daughter thought it was a "great adventure". Fun, fun.