Use playing cards to learn about temperature as well as positive and negative integers in this fourth grade math game.

Watch pre-packaged seeds and seeds taken from inside fruits and vegetables grow. Which ones will grow faster? Read more in this science fair project idea.

Master addition, subtraction, multiplication, and division through practice in this fun math game designed for fourth grade!

Free science fair project idea that examines the differences between cats and dogs. Analyze objective qualities rather than subjective ones.

Add negative and positive numbers in this fun math card game for fourth graders!

Does the temperature of a magnet affect its strength? Learn about the relationship between magnets and temperature with this cool physics science fair project.

To practice place value, here's a fun hands-on activity to get your child flipping through place value with ease!

In this project, all you need is a protractor to learn how to use the altitude of Polaris to find latitude on Earth. Polaris is also known as the North Star.

This science fair project investigates whether tapping the top or the side of the can will stop a vigorously-shaken can of soda from exploding.

Learning to identify prime numbers can be tricky. But this fun card game can make memorizing some basic prime numbers a breeze.

This science fair project idea explores whether a plastic slinky works as well as a metal slinky when walking it down the stairs.

Discover how and which salt melts ice the quickest.

This science fair project idea explores whether white light can be separated into different colors.

This fun calculator exercise will take the mystery away from the machine, and familiarize your child with the functions of a calculator.

Find out whether packaged seeds actually do expire in this new science fair project idea.

Create a fun hands-on game to practice long division, using magnetic numbers on a fridge.

This is a simple, fast game that you and your child can make together to help him master rounding with decimals.

Use a deck of playing cards to practice place value and other math concepts with your upper elementary child!

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

Help your kids map the "global footprint" of your family's grocery cart by investigating how far your food travels before landing on your dinner table.

Learn how to make a ping pong ball anemometerâa device used to measure wind speedâin this free science fair project idea.

In this science fair project, students make their own rain gauge to measure rainfall.

Science fair project that examines how winter storms form and the relationship between temperature, moisture and snow.

Science fair project that examines albedo, and how this information is applied in the design of cars, sportswear, and other items. Which colors reflect light?

The goal of this project is to create an exciting topographical map out of dough.

Kids will learn about the interaction of lactose and lactase in milk and discover why we describe enzymes as catalysts in this fun science fair project.

What is elasticity? Students will investigate how this concept applies to bouncing ball physics by testing the bounces of balls made out of different materials.

This science fair project focuses on a polymer called hydrogel super absorbent crystal which absorbs water, swelling to many times its original size.

How well can people recall what they have observed. Test your knowledge in this fun experiment.