A sukkah must have at least three walls. The roof of the sukkah must be made of material referred to as sekhakh, which means "covering." Sekhakh must be something that grew from the ground and was cut off, such as tree branches, corn stalks, bamboo reeds, sticks, or two-by-fours. Sekhakh should be sparse and left loose enough so that the stars can be seen. In this photo, an Israeli boy has found some sekhakh on his way home from school, and is dragging it to put on his family's sukkah.

A sukkah may be any size, so long as it is large enough for you to fulfill the commandment of dwelling in it. It is common practice, and great family fun, to decorate the sukkah.