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In this simple activity, learners investigate refraction by placing a picture of an arrow behind a glass of water.

Are there boxes, is this an illusion, or is this real life Q-bert? Illusions are always fun to build especially when you can build them.

In this optics activity, learners explore how light bends and affects what we see.

In this activity about light and reflection, learners use a special device called a Mirage Maker™ to create an illusion.

Do you have a hard time matching paint swatches with your furniture? When you consider human perception, color is context dependent.

In this trick, hold your hand over a burning candle without getting burned, by reflecting and transmitting the light of two candles. This activity is best suited as a demonstration.

In this activity, learners control the (apparent) size of a hole with their brain.

In this activity, learners use a simple trick of perspective to dress friends in tiny cutout clothing. Learners make tiny pants out of card stock and tape them to the end of a stick.