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In this activity, learners examine fingerprints. Learners leave a hidden print on a surface and then make their own print detecting powder from graphite (found in pencils).

In this activity, learners explore the different salinities of various sources of water by taste-testing.

In this activity, learners sniff out scents hidden in balloons! After investigating, learners discover we sometimes can use another sense (smell) to detect things too small to see.

In this activity, learners use simple materials to create giant bubbles.

In this activity, learners explore the possibilities of clay as a natural material.

In this activity (posted on March 12, 2011), learners follow the steps to construct a spectroscope, a tool used to analyze light and color.

In this activity, learners make their own heat waves in an aquarium.

In this activity, young learners use their sense of touch rather than sight to identify a mystery object in a bag. Learners take turns acting as "peekers" and "sensers" throughout the game.

In this activity (12th activity on the page), learners conduct an experiment to demonstrate how muscles are constantly feeding information to the brain about what they are doing.

Are balloons porous or non-porous? In this activity, learners watch an entertaining Mr. O video and conduct a simple experiment to find out.

This is an activity exploring color and color mixing.

In this activity, learners set up an experiment to investigate the effects of hot air on the path of a laser beam.

When you teeth clatter, they make quite the racket disproportionately to how much they actually sound to someone else.

In this activity, learners create a water prism to break light into the seven colors of the rainbow.

In this four-part activity, learners explore how the body works and the chemistry that happens inside living things.

In this activity, learners discover that our hands are not reliable thermometers.

In this two-part activity, learners use household items to smell the difference between some stereoisomers, or molecules which are mirror images of one another.

In this activity, learners sublimate dry ice and then taste the carbon dioxide gas.

In this activity, learners explore color, light and shadow by creating their own puppets to hold in front of a light source.

In this activity, learners build models of comets, using edible materials, to learn about comets' structure.