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Use walls that can stand up to the wind. Add a roof made from plant matter. Decorate your sukkah. Alternatively, buy a ready-made sukkah from The Sukkot Project at www.sukkot.com. Leave your sukkah up until the end of Simchat Torah.
The sukkah, which is the definitive Sukkot tradition, is quite simple to build. The four-sided booth must have at least three walls, while the fourth wall can be used as a door. One of the walls can be low or removable to allow passage into and out of the Sukkah. The material used to build the sukkah can vary, but because the Sukkah will only remain standing for seven days, a light material probably makes most sense. The only traditional requirements for the walls are that they be able to stand up in the wind. With this definition, even canvas stretched across a hard frame is suitable. In terms of size, you'll want your walls at least far enough apart that you'll have room to eat in the Sukkah. Depending on the size of your family, this can cause the size of your sukkah to vary greatly. Traditionally, the roofs of sukkah are made from plant matter, like branches, leaves, twigs, and so on. These materials can be purchased or taken from nature. According to tradition, the roof of a sukkah should be thick enough to provide shade and shelter during the day, but you should still be able to see stars through it at night. Making a roof from plant material is a way of giving remembrance to the Israelites who wandered in the desert for 40 years after leaving Egypt. During their travels, they had to live in temporary dwellings similar to the sukkah, using whatever materials were available to them for shelter. Decorating the sukkah is seen as a commendable show of Sukkot observance. Traditional decorations include harvest vegetables: Corn, pumpkins, and squash hung from the ceiling and beams or placed in corners. Other decorations include but are not limited to: paper chains, pipecleaner constructions, religious pictures or drawings, wax paper stained glass, or anything else that you or your children feel like creating. Children usually love to help decorate the sukkah. Giving your children a chance to draw on the walls of the sukkah and gather vegetables for display is a great way to get them involved in the holiday from an early age. If you're in a rush or you don't have the materials necessary to buy your sukkah, don't worry!  These kits allow you to set up your own sukkah without having to prepare any of the materials yourself, saving you lots of time. As an added bonus, these kits can usually be easily disassembled for use next year. Sukkah kits usually aren't terribly expensive. Depending on the size of the finished sukkah and the materials it's made out of, a kit will usually cost anywhere from about $50.00-$120.00. The sukkah traditionally stays up throughout the Sukkot holiday, serving as a place to gather, eat, and pray for all seven days. Immediately after Sukkot 2 holy days, Shemini Atzeret and Simchat Torah. Though they're not part of the Sukkot holiday, they are closely associated with it, so the sukkah isn't traditionally disassembled until after Simchat Torah. It's perfectly acceptable to save your disassembled Sukkah materials so that you can use them to build another sukkah next year.