This is a great demo - it's often done at kids' science museums as well, if they have an instructional area. Particularly with kids' tiny lungs, they can only f

This is a great demo - it's often done at kids' science museums as well, if they have an instructional area. Particularly with kids' tiny lungs, they can only fill a fraction of the bag, then when they do it this way, they fill a bag bigger than themselves. It's definitely memorable.