The players divide into teams of two. One player from each team is then blindfolded. The players who can see in each team are handed a picture, all the teams have the same picture. Each team then has ten minutues to copy the picture as best they can, the person who can see must describe the picture to their blindfolded partner. After the time limit, all the pictures are collected, the team with the best copy wins. Then each team swaps places so the drawer becomes the guide, and the guide the drawer. Different pictures are used though.
Source: From the original site.