Some interesting things that happened

• A graceful young Chinese woman added the Chinese characters for "spring", "summer", "autumn", and "winter", placing them carefully in just the right sections of the picture. 
• Three little boys in matching orange soccer uniforms tried to copy her beautiful calligraphy, and she declared their efforts a success.
• A runner training for his first marathon stopped just long enough to add a blue Nike "swoosh".
• An eighteen-year-old girl insisted her entire family pull over and get out of the car.  Swirling spirals, a flaming tulip, and a blue chessboard appeared on the canvas, thanks to them.
• A mysterious stranger contemplated the painting for a long time, but opted not to paint because, as he enigmatically put it, he chose to "save all his creative energy for music."
• A two-year-old girl painted with great enthusiasm while simultaneously eating pizza.
• A charming runner painted a pterodactyl and a tyrranosaurus rex.
• A little boy painted a blob in front of the t-rex, excitedly narrating a story about how the giant rock was rolling down the hill, but the dinosaur would jump over it just in time.
• The ice cream truck drove by, and a little girl stopped painting and shouted, "Listen!  It's the Song Truck!"  Strangers shared stories about childhood.
• A ten-year-old boy painted a group of concentric circles with dots that reminded me of flowers by Gustav Klimt.