One player is the lighthouse. Half the players are ships, and are blindfolded at one end of the room. The other half are rocks, and distribute themselves on the floor between the ships and the lighthouse. The lighthouse goes ";woo woo"; to guide the ships. The rocks go ";swish, swish"; quietly to warn the ships of their presence. The ships navigate between the rocks to the lighthouse. If they touch a rock, they are sunk and must sit blindfolded on the floor and become rocks. When all the ships have made it to the lighthouse or have become rocks, the blindfolded players become rocks and the rocks become ships.
Source: From the original site.