Try and blow a ball of paper into a squash bottle and watch it fly back out, this one had my 6 year old in hysterics and is a super simple demonstration of air pressure. (science-sparks.com)
A very simple demonstration of the use of such technology is BMW's vision for training service personnel using augmented learning. (elearningindustry.com)
Teachers overcome their experiment fear and do simple demonstrations with confidences. (teachtolead.ideascale.com)