The old fashioned sand timer may limit the amount of time they get to execute their sketch, but it certainly doesn't limit creativity! Time's up! All players, all at the same time, pass their sketch to the next player, who must guess what's been drawn. Players then simultaneously pass their guess- which hopefully matches the original word (or does it??)- to the next player who must try to draw the word they see and so on.
The timer has run out! At the same time, each player passes their sketch to the next player, who must guess what was drawn. Players then give their guesses to the next player, who must try to draw the word they see, and so on.