When UK mathematical artist Nick Sayers did a residency at the Orchard Garden in July 2014, he taught PME conference participants and UBC Orchard Garden people how to make 6-month pinhole cameras from a pop can, to record the path of the sun from the summer solstice to the winter solstice. We put four of these cameras up in the garden in July (close to the summer solstice), and took them down on Dec. 22, 2014 (at the winter solstice). Here are the absolutely beautiful results! I think that the two that sustained some water damage are actually the most beautiful --- an example of wabi sabi. What do you think?