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Pinhole Magnifier
Source Institutions
In this activity related to light and perception, learners use a pinhole in an index card as a magnifying glass to help their eye focus on a nearby object.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-005-307.jpg?itok=3BwjpBxA)
Your Blind Spot
Source Institutions
In this activity, learners will explore how their own eyes work by experimenting with their photoreceptors.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-213.png?itok=_zCsfrZv)
Size It Up
Source Institutions
In this artistic activity, learners blow up a smaller picture into a larger one, by using a grid.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-004-323.png?itok=rvdY3PTE)
Afterimage
Source Institutions
In this optics activity, learners investigate afterimages.