The game contains a deck of cards, each card contains a simple line drawing. Players take turns drawing a card and trying to get the others to copy the picture (and guess what it is) by describing it to them. The catch is you have to describe the drawing in geometric terms. For example, you can't say, "Draw a smiley face." You have to say, "Draw a circle. Put two dots next to each other inside the circle in the top half..."