Above: Before the volcano erupted
I did these last year, but I just love them. These are way cooler in person than in a photograph. Basically, I had students draw a before and after picture of a town with a volcano. On a piece of paper, students used oil pastel to draw a quiet town before the volcano erupted. Then a clear transparency was stapled on top. Gell markers were used to draw in the lava. This is the part students loved.