This was a good day! I came away with some new websites to use as resources for my classes, and some interesting new demonstrations/labs to try with my students. The egg drop and removal they will like and that is nice for me because we don't have any materials that could cause problems. The bell jar concept is a good visual. We usually play with the balloons but I haven't used the marshmellows before. The lungs will be a good one for demonstrating the differences in pressure and addressing the pressure to volume relationship.