Race to double numbers in this competitive card game. Try one-digit or two-digit numbers, or more!

In this activity, your child will reference Matisse and also learn about patterns.

Your kindergartener will learn basic math concepts and create a beautiful keepsake with this African flag reference book.

This science fair project idea highlights decomposition rates by comparing how long it takes an item to decompose in a compost pile vs. a landfill.

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

Discover the science behind materials that absorb heat, and materials that don't, by constructing this cork trivet for your dinner table.

Sharing can be a challenge, and division doubly so! Practice halving numbers in this competitive card game.

Make beautiful print block art with your kids using recycled materials.

Make a homemade doll out of recycled materials, similar to dolls made by pioneer children.

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

Engage your third-grader in this version of the classic game and she will get lots of practice using mental math to solve addition and subtraction problems.

This game reinforces the meaning of the term "multiples" and is fast enough to hold the attention of your fourth-grader.

In this activity, learners will discover how to make a basic water filtration system using common materials found around the house or outside.

Here's how to create an easy travel checkers board that you are your child can enjoy together using simple materials.

This project compares the strength of one, two, and three-ply toilet paper.

The purpose of this science fair project is to determine which conditions and materials quicken the composting process to make the best compost.

Create this homemade slinky snake from recycled materials. It can move and slither about like the real thing!

The objective of this science fair project is to examine the basic principles of air pressure using simple materials like a balloon, straw and string.

Science fair project that examines how to grow bacteria in a controlled setting, using simple materials from around the home.

Beach bags don't have to be bought...make your own beach bag out of recycled materials in this summer craft.

Celebrate Earth Day by making colorful animal sculptures using recycled materials from around the house in this 3rd grade arts and crafts activity.

Understanding absorption means understanding why certain fibers and materials can absorb water! Kids will see absorption in action in this simple project.

This is a fantastic and easy science experiment where kids will learn about elasticity by testing how high bouncy balls of different materials can bounce.

Kids will conduct a cool limewater carbon dioxide test that can be performed with common household materials to learn about the chemistry of this common gas.

Want to reuse materials that would otherwise get tossed in the trash? Show your third grader how to get crafty with old newspaper and fabric.

For this science fair project, kids will learn how to make a lemon battery. They can conduct this classic experiment using readily available materials.

Coil your daughter's two favorite colors into a wearable pendant with just a few scraps of felt!

Inspired by colorful African drums and crafted from recyclable materials, these pencil holders will make a bold and charming addition to any desk set.

Create a chunky, textured, tactile giraffe collage that is cute enough to pet! This is a great way to recycle old arts and crafts materials.

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.