So, I'm working in my office this afternoon and I hear some 5th graders say, "Let's blow up the librarian." Now, some people, upon hearing this may have shut and locked their door, but I came out to see what was going on! Raising up the librarian might be a better description - but it does involve blowing up ziploc bags with straws. If you want to try this, you can get directions by clicking on the link: http://pbskids.org/zoom/activities/sci/airlift.html