This is a fun activity that I found in one of my favorite books, “Sharing Nature With Children” by Joseph Cornell.  If you find yourself on a trail where there are a lot of trees, pick one person to pose like a tree of their choice.  Everyone else has to try as guess which tree they are posing like.  It is kind of like “Charades” meets “I Spy”.  It is a super fun activity for all ages on a hike.