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In this activity on page 1 of the PDF, learners compare the relative sizes of biological objects (like DNA and bacteria) that can't be seen by the naked eye.

In this activity about depth perception, learners create an optical illusion in a shoe box.

In this activity, learners explore their eye pupils and how they change.

In this demonstration/activity, learners observe as a regular size marshmallow is blown through a tube made from a manila file folder.

This activity provides instructions for making an aircraft that can really fly using a straw and paper hoops!

By making models of light waves with paper, learners can understand why different colors appear in bubbles.

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.