This is a drawing game played in turns by two teams of two or more people each.
Each turn, a team chooses a depicter and a drawer. The other team picks an object and whispers it to the depicter.
The depicter, positioned not to see her teammates (e.g. turns her back to the drawer and to the drawing), tries to describe the object by using only geometrical descriptors.
The drawer draws accordingly.
When the time is out or that the depicter says she's done, her team makes a limited number of guesses as to what the object could be.
Correct guess brings a point to the team, and incorrect ones a lot of fun to the game.