At my old school I had the students make mono-chromatic sculptures to hang above their tables. Our first ones were made with paper, but had to be thrown away because they were a 'fire' hazard (it's an art room). The second ones we made hung for the 3 years I was there and were made out of clay!
My new school has no rules about hanging things from the ceiling so my 2nd graders went to town using paper, chenille sticks, pop tops, stickers, crayons, markers, colored twist ties, beads, and any other colored 'craft' supplies I could put at their tables. We talked about what mono-chromatic means - we also practiced different things to say, like: "When you are done, may I use that?" "Could you please pass the bucket?" "Are there any more chenille sticks?" "I was planning on using that could you please give it back?"
The pictures do NOT do these justice - they are too detailed, chaotic, beautiful, and textured to photography well.