Pressure: Mash marshmallows vacuum pack a student and take the suction cup challenge, , , The goal is to teach the basic concepts of pressure in liquids and gases in an engaging and informative way, Twelve teacher/student demos and ten hands-on activities, Marshmallow Masher - Students compress the air in a container with marshmallows inside and witness the results; Pascal s Pillow - Students learn the power of air pressure when they lift a book using a balloon and their own lungs; Crushing a Can - Demonstration on how to crush a can using air pressure, American Educational Products have a lead ship time of 21 days, SKU: AMED665