One player is blindfolded and is given a cane or stick. The other players march around them in a circle. As soon as the blindfolded player taps their cane loudly, everyone stops. The blindfolded player points his cane at someone and that person must say ";quack quack";. The blindfolded player tries to guess who it is. If he guesses correctly the first time, he trades places with that player. If the player does not guess correctly they continue until they are right.
Source: From the original site.