Do you think you can blow down a sand castle with a mighty wind? Find out which material stands up best to erosion in this erosion experiment.

How do organic materials become soil? This science experiment measures what materials biodegrade.

Create a self-portrait from natural materials in this collage craft activity!

In this activity, your child will be challenged to use simple materials to create a catapult for a small, lightweight toy.

Instead of buying new sunglasses this summer, why not use recycled materials to make some of your own?

Using simple materials, children will create a movement card game that the whole family can play together.

Create a one-of-a-kind lunchbox with your second grader using recycled materials and some down home ingenuity!

Help your second grader craft some lovely, personalized Valentine's Day cards--out of kitchen materials!

Recycle old materials to create a fun, brain-teasing maze toy that also strengthens your child's math reasoning skills.

By incorporating natural materials and the powers of observation, your child will become a backyard naturalist while building early writing and drawing skills!

Made entirely out of recycled materials, this handmade decoration is a great way to spruce up a dresser, bookshelf, or the living room mantle.

Help your child use recycled materials, a little imagination and some writing skills to build his very own recycled creature.

Help your child use an old water bottle and a few other household materials to make her own eco-friendly pal!

This rainbow collage activity is a great way to practice using different materials to create texture. The completed craft is sure to brighten up any space.

Help your child rocket off for some high-flying fun with a jet pack you make from recycled materials and a few odds and ends.

Make going back to school a fun time! Let your child create her own pencil topper creatures using everyday materials and a Styrofoam ball.

Help your child organize her jewelry or hair bands with this pretty holder made from recycled materials. The finished holder also makes a great gift!

Who says you have to buy your toys at the toy store? In this activity, you can plan and build a pretend play city entirely out of recycled materials.

Fly into some rainy day fun with a cardboard airplane project. Making paper airplanes is fun, but you can add a new twist by using recycled materials instead.

This science fair project examines how seeds hitchhike on animals and clothing.

Get down to the rubber with this science project that tests the effectiveness of different types of erasers.

Science fair project that examines the behavior of water and gravel in creek beds and the formation of sedimentary rocks.

In this fun design challenge, your child will get creative with making structures out of toothpicks and gumdrop candies.

In this free science fair project idea, we learn about surface tension and how it can support mass—in this case, a floating paper clip.

This simple heat transfer experiment is a great introduction to the concepts of heat transfer and conduction.

Make a bouquet of colorful duct tape flowers in this hands-on spring craft.

In this activity your child will create their very own marble maze!

The project investigates how water and movement affects erosion.

This project determines whether Styrofoam, paper, or plastic cups are best for preventing ice from melting.

In this cool science experiment, learn about magnetism and poles, and test magnet strength to find out if two magnets are twice as strong as one.