Can you blow this up in one breath?
This experiment is a favourite from Steve Spangler and always good fun. You can even try it out with diaper Genie bags – just tie one end up!
Test 1: Blow the bag up like you would a balloon.
Test 2: Blow the bag up with a gentle breath stream and the opening held out by extending your thumb and pointing fingers. Keep your lips a few centimetres away from the opening…. Ask a friend to hold the other end so that the windbag is horizontal..