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In this chemistry activity, learners witness an exothermic reaction, while making their very own, completely usable sidewalk chalk. This is also an excellent activity for exploring color mixing.

In this activity about camouflage, learners create a model that shows how a flounder is able to blend into a variety of environments.

Using information from the My Place in Space lithograph, learners write and/or draw a postcard to friends and family as if they had gone beyond the interstellar boundary of our Solar System, into the

In this quick activity (page 1 of the PDF under SciGirls Activity: Music and Sound), learners will construct an oboe-like instrument from a plastic drinking straw by cutting the end to split it into t

During this activity, learners take part in a variety of tasks which involve moving and balancing different body parts.

Align four color transparencies, each one a single color (cyan, magenta, yellow, and black), and see a beautiful full color image.

Learners make their own paper using old newspaper. Learners can make their paper colorful by adding construction paper.

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.

In this activity, learners write invisible messages on goldenrod paper, and make the message appear and disappear using acids and bases.

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

The Sacred Cenote at Chichén Itzá is a sink hole, or well, containing groundwater. In this activity, learners create their own cenote using chalk, limestone, acids, and rain water.

Make a kite out of a garbage bag, shower curtain, painting tarp--anything light, thin, flexible and plastic!

In this activity, learners build a racecar using only a rubber band, spool, straw, and paper clip! This racer is a classic toy that zips across a flat surface.

In this activity about light and perception, learners create pictures in thin air.

In this engineering activity, young learners investigate multi-level buildings.

In this activity, learners construct a simple game to test their hand-eye coordination and steadiness of hand.

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

How many colors make black? Gather as many water soluble black markers as you can find.

In this three-part activity, learners use paper to explore Bernoulli's Principle — fast-moving air has lower pressure than non-moving air.

In this activity, learners build a paper stellated rhombic dodecahedron, a three-dimensional 12-pointed star.