Materials: one or more softish large balls, a way to mark out game zone (masking tape or chalk)
Tape or mark out a ‘game zone’ area that gives each person about say 1m2 each. Leaders (then players who are out) line the outside of the game zone and throw balls, aiming to hit players below the knees to get them out. Last person in is the winner.
Variation: could do as two teams and time the game to see how quickly each team can get the other out.