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In this activity about backyard habitats learners create a safe and toad-friendly environment near their own home.

In this activity, learners will experiment with textures, shapes, and materials and create their own unique masterpieces.

In this activity, learners will write a secret message that only their friends will be able to read.

Use this activity (13th activity on the page) to introduce learners to the sense of touch. Learners collect objects of varying textures like feathers, rocks, sand, etc.

In this activity, learners will construct an air cannon as a model for the human ear.

This activity provides instructions for making an aircraft that can really fly using a straw and paper hoops!

This activity provides step-by-step instructions on how to build a rain stick, a musical instrument originating in South America.

Learners will explore the chemistry of mucous and its importance to our health by following a process to make their own replica "snot." The activity includes a time and age recommendation, a materials

In this activity, learners craft their own model of a comet on a stick to make it fly around the room.

In this hands-on activity, learners make New Year's Eve party hats out of wrapping paper. Learners use symmetry and measurement to cut out shapes they need to assemble the hats.

In this game, learners cutout a model black hole "cone" and attempt to roll around a marble or other small spherical object without touching the event horizon.

In this up-cycling activity, learners recycle plastic bags and repurpose them into useful wallets.

In this activity, learners will observe laminar and turbulent flow of water using only a plastic bottle, liquid hand soap, food coloring and water.

In this activity, learners investigate the reflective properties of light and mirrors as they make a kaleidoscope.

In this hands-on activity, learners simulate the crashing and smashing of a meteor impact using household cooking supplies.

This design challenge is an open-ended exploration of linkages, a group of parts connected by hinges, and the types of motion they can create.

In this activity, learners build inexpensive kaleidoscopes using transparency paper and foil (instead of mirrors).

Learners estimate how many small triangles will fill a larger shape. Then they use a triangle stamp (or stencil made from a file folder) to fill the larger shape with triangles.

In this activity, learners build a slide whistle using PVC pipe, bamboo skewer, and piece of foam. Construction of the instrument is relatively simple.

Learners use M&Ms® (or any other multi-color, equally-sized small candy or pieces) to create a pie graph that expresses the composition of air.