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This is a quick activity/demonstration that introduces learners to the concept of index of refraction. Learners place stirring rods in a jar of water and notice they can see them clearly.

In this optics activity, learners discover how they can make glass objects "disappear." Learners submerge glass objects like stirring rods into a beaker of Wesson™ oil to explore how the principles of

Create your own spinning top, and explore color, shapes and spinning. This activity contains instructions for making your spinning top, and tips on how to design and decorate it.

This activity generates learner excitement about light through the creation of a room-sized rainbow.

These two activities (4th on the page) demonstrate the importance of two eyes in judging depth.

In this activity, learners create a "mini sky" in a glass of water in a dark room.