You need chairs for all but one person, which are all given a number. Everyone, except "it" sits on a chair in a circle. The more people playing and the bigger the circle the better. The player who is to be "it" stands in the middle of the circle. They are then blindfolded and spun around. They then call out two numbers, the players on those seats must change places. "It" has to try to get to one of the vacant seats before the player who can see does. If they are successful, the player who was beaten to the seat is now "it" otherwise it must go back the the circles centre and spin around again. They then call out another two numbers and keep doing this till they get to the vacant seat in time.
Source: From the original site.