I got this lesson from an old issue of Arts and Activities or SchoolArts, two of my favorite magazines. This is a nice lesson for teaching variety and repetition. In the past I had the students create an organic shape, then divide it into sections to use repetitive symbols. This year I had the students use ruler to create pipes. We even went on a field trip to the boiler room and saw all the pipes in the building. When the students are finished they cut out the design and then use a stapler to hold different pipes to POP UP over black paper.