One player is blindfolded, then everyone else mixes themselves up (in terms of height) and stand in a line. The blindfolded player then has to rearrange those standing in the line so they are all in correct height order. Their time is taken. Another player then takes their turn. Once everyone has had a turn at being blindfolded and trying to arrange the others, the player with the quickest time is the winner.
Source: From the original site.