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Center of Gravity
Source Institutions
A simple, yet fun activity that lets learners find the center of balance of a ruler (or any long thin object). Developed by the Exploratorium and no assembly needed.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-004-690.jpg?itok=SxLt-zEc)
Overlapping Spots: Make a bright spot brighter
Source Institutions
This perception trick focuses on conflicting information to the brain...instead of trying to see two images, you're trying to get a bright spot by overlapping the image you see through two tubes.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-004-492.jpg?itok=KkkJB7t7)
Newspaper Bridges
Source Institutions
In this activity, learners build bridges out of newspaper and tape to explore how structures are designed to bear loads.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-003-530.png?itok=ILwk_MY9)
String Shapes
Source Institutions
In this activity, learners work together to make polygons (many-sided shapes) with string. Learners sit on the floor and hold onto a piece of string slid between their thumbs and index fingers.