Get some small sticks and place them side by side then tie them together with some string. Place the bottom ends of the sticks in a piece of modelling clay. Take a brown paper bag and cut it open then place it on top of the sticks. Cut away a piece for the doorway and secure it temporarily in place with some tape. Apply a blob of glue to a long stick and put it in through the opening in the brown paper and dab it where the paper meets the support sticks. After a few minutes you can remove the tape from the teepee and decorate it as you wish.