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Amazing Marshmallows
Source Institutions
In this demonstration, learners observe the effects of air pressure. They will watch as marshmallows inside a bottle expand as a vacuum pump removes air from the bottle.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-004-895.jpg?itok=daicFs87)
No Pressure
Source Institutions
In this activity, learners observe what would happen to their bodies if they went to outer space without a space suit.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-829.jpg?itok=d6a0Bqrc)
Falling Feather
Source Institutions
In this physics activity, learners recreate Galileo's famous experiment, in which he dropped a heavy weight and a light weight from the top of the Leaning Tower of Pisa to show that both weights fall
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-004-512.png?itok=JyHczqED)
Engineer an Octopus Suction Pad
Source Institutions
In this engineering design challenge, learners build an octopus-inspired suction pad that can grab an object and hold it tightly in the air.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-000-678.jpg?itok=sBy1clYj)
In the Toilet
Source Institutions
This activity explores the basic workings of a siphon, which is the core technology that makes toilets work.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-003-969.jpg?itok=8V7JHi7w)
Keep it Cool
Source Institutions
In this activity, learners explore how engineers have met the challenge of keeping foods, liquids, and other items cool.