Throwing ball between two lines of Beavers.
Beavers form two lines about four feet apart facing each other. The Beaver at the start of one line tosses the ball across to the Beaver at the start of the other line. After the ball has been tossed the Beaver runs to the end of the opposite line. The Beaver who was catching the ball throws it to the new Beaver at the end of the line and then runs to the end of the opposite line. Eventually the lines will have reversed. Can be repeated only further apart.