It is placed at a starting line, and kids try to balance on it and walk to the finish line. If they fall off, they must start over. Use the same log as above. Have two people get on each end and have an old-time contest of trying to roll the other off. Cut a log and notch it so that a rope can be tied around it.
Kids then compete to pull it a certain distance for the best time.
You might have different sizes of logs for different age groups. Choose a sturdy branch on a tree and tie a rope to it. Then tie on a log, hanging straight down. Stand four slender logs on end around the hanging log. The hanging log then is used as a bowling ball.