For the Valentine month-- February, I made two and three dimensional heart trees. The 3-D tree at the front of the display started off all-white in December & January surrounded by falling snowflakes (which I forgot to take a picture of before I changed the display). I made it by crinkling and wrapping two eight foot (approx.) pieces of white packing paper around a cardboard tube. The limbs were made by halfing the paper at about four feet high, then halfing those four halves to make eight strips to make branches, and so on. About halfway through January I added red buds to the ends of the branches, which were actually red hearts rolled up. The photos you see here are after the hearts have blossomed, which I unfurled about a week before Valentine's Day.
The 2-D trees in the background were inspired by the look of stained glass, although I used pieces of paper taped to a black background. I penciled in a design and then filled it in with pieces of paper, leaving the black background showing to give it the look of seams. I cut up glossy publisher catalogs for some of the hearts, along with red butcher paper and even a glossy gift bag. I wasn't sure if it would look like trees until I taped it up, and was pleased that students and teachers recognized them as such.