duck on a rock

(sometimes hyphenated) A traditional children's game in which multiple players stand behind a throwing line and each takes a turn throwing a stone (sometimes called a "duck") at a target rock (sometimes called the "drake") that is guarded by another player, such that when a player's thrown stone dislodges the target rock all the players run to retrieve their thrown stones, while the guard replaces the target and then attempts to tag a player before he or she can return to the throwing line. If the guard successfully tags a player, then the guard and player swap roles.