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Check out this cool science fair project idea that models the behavior of the cold desert plants: xerophytes and halophytes.

What's the best way to make DIY compost? Kids will learn about aerobic and anaerobic decomposition while learning to appreciate the value of composting.

Has your child ever asked you how a submarine works? Here's a simple bathtub project that will make for a hands-on answer.

This science fair project idea investigates the hardness property of minerals.

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.

Stories change as you retell them. The objective of this science fair project is to demonstrate how information gets interpreted, distorted and changed.

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

Learn all about balance and motion as your child designs a corn maze!

This interdisciplinary card game will have your third grader working on math facts as he travels through the solar system!

How does a kazoo, the strings of a guitar, or the speaker of a radio make sound? The purpose of this science fair project is to show how vibration makes sound.

Your third grader will be amazed at the explosive combination of vinegar and baking soda in these chocolate volcano cupcakes with white chocolate "lava."

Learn how to tell time by the sun with this cool science fair project idea that tracks how the accuracy of a sundial changes over time.

Create a homemade pair of sunglasses with colored lenses to see just how light and color affect our sight! Use this fun project to practice science!

In this project, you'll build a model of the earth, complete with all seven continents and four major oceans.

Science fair project that examines the different types of precipitation, evaluates the density of snow and calculates the ratio of snow-to-liquid.

Who knew that you could make beads out of rose petals? Not only can it be done, but the beads smell wonderful!

How does rust form? Kids will learn about the roles oxygen, water, and electrons play in rust chemistry in this cool science fair project idea.

Gather some friends for a bubbly soda taste test do determine calories' role in your favorite drinks.

Make a DIY golf putter and design your own golf putting course in this 2nd-3rd grade arts and crafts/game activity.

This easy aerodynamics activity is a simple way to introduce kids to the scientific method.

Observe with your third grader what happens when food starts to decompose, and boost science skills simultaneously with this experiment!

In this physics project, learn about the relationship between light intensity and distance using a laser pointer, flashlight, and graph paper!

Introduce your child to the world of motion and physics with a bit of marble play inspired by Sir Isaac Newton!

In this project, learn about animal vision and different kinds of eyes: ocelli, compound eyes, and camera eyes. Find out what a jellyfish or grasshopper sees!

Learn about savanna flora and fauna in this science project! Take a look at characteristics of tropical grassland plants and animals that help them survive.

This easy and inexpensive paper towel science project introduces kids to important physical concepts like cohesion, adhesion, and capillarity.

Science fair project idea which teaches you how to make butter by separating cream into butter and buttermilk.

Do you think heat can affect a plant's growth rate?

In this experiment, kids will see if pruning tomato plants makes them more fruitful and learn about the factors that contribute to a plant's fruit production.

This science fair project idea investigates how magnetism can defy the force of gravity.