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This fun and simple hands-on astronomy activity lets learners explore the difference between telescope magnification and resolution.

If you had a long tube with a 5 millimeter wide slit, would you see the entire Golden Gate Bridge?

In this activity, learners construct three optical illusion toys to examine how our brains play tricks on what we see.

In this artistic activity, learners blow up a smaller picture into a larger one, by using a grid.