"Duck, Duck, Gray Duck" Isn't Just A Stupid Regionalism, It's A Better Game
by Alex Pareene from Deadspin > Sports News Without Fear, Favor or Compromise on (#34N9W)

A bunch of kids sit in a circle. One kid, who is "it," walks the circumference, tapping the seated kids one by one, saying "duck, duck," and then tapping a kid and saying something other than "duck," and that kid has to chase and tag "it" before "it" makes it back around the circle to sit in the newly opened space."