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Rocks are made of minerals, and minerals often have crystal shapes. In this fun activity about geometry in nature, learners create their own crystal shapes out of paper.

Create an illusion where it appears that your hand has a hole in it. You'll see the results from when one eye gets conflicting information.

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

Create beautiful spirals by drawing a straight line. This sounds crazy, but you can with a turntable (a record player or lazy susan), paper, and pen.

Which one of your eyes are dominant? Do they act independently or are they equally "in control?" This activity explores how your eyes work (or don't work) together.

In this simple activity, learners discover how a mere piece of paper can be used to hold up the weight of a heavy book.

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

Learners will do an experiment to determine which type of paper is strongest while focusing on variables and collecting data.

This science activity demonstrates the dominant eye phenomena. What does your brain do when it sees two images that conflict?

In this activity, learners explore the properties of paper by constructing and modifying paper airplanes.

In this activity, learners manipulate paper to build original 3-dimensional sculptures. Appropriate for any age, learners can use fingers to tear, crumple, or fold, and if available, scissors to cut.

Things that are different sizes and stiffness vibrate differently, and in this Exploratorium Science Snack, you'll see how rings of various diameters react to vibration and external forces.