I went to school on Monday for my last science lab for Logan’s class.  The topic this time was the respiratory system.  The class discussed the different parts of the respiratory system, and the kids were given a balloon model to demonstrate the interaction between lungs and diaphragm.  The second half of the class, the instructors showed the kids a healthy pig lung and how much it expanded when air was pumped into it.  Then they showed a pig lung that was exposed to smoke for 30 days.  This lung, not only looked black, it did not expand as much.  The show-and-tell was quite graphic; it was a bit much for a couple of kids, but hopefully it would make an impression in kids about smoking.