What is "duck, duck, goose"

n. A children's game in which one participant walks around a circle of others, designating each of them as a "duck" until selecting one to designate as a "goose", who must then chase the selector.

Duck, duck, goose (sometimes called Duck, Duck, Grey Duck or Daisy in the Dell) is a traditional children's game often first learned in pre-school or kindergarten. The game may be later adapted on the playground for early elementary students. The object of this game is to walk in a circle, tapping on each player's head until one is finally chosen and he or she must chase the picker to avoid becoming the next picker.