In this Halloween-themed activity, young learners will find out what happens when they mix two household items together to create a surprising chemical reaction.

Check out this cool science fair project on identifying rocks and minerals for kids.

Kids will learn how to make a steam powered rocket boat, also called a putt putt boat or a pop pop boat, in this great science fair project for 4th graders.

Do earthworms like moisture or darkness? Find out as we explore the relationship between earthworms and light.

In this hands-on design challenge your child will make their very own Rube Goldberg Machine.

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

What's a liquid? What's a solid? What better way to experiment than by turning a childhood favorite, ice cream, into a homemade science lesson!

How do the phases of the Moon and gravity cause spring tides and neap tides? Does the Sun play a role in the tides? Figure it out in this fun science project!

This science project has students study a group of volunteer liars actively lying to study the behavior of a lie. Students see if they can figure out the truth.

In this exciting design challenge, your child will use design thinking skills to create a mixture that can inflate a balloon.

This science fair project teaches about mold. Students will test different foods to see which grow mold the fastest.

Does electricity move better through thick wires or thin ones? kids will conduct this classic electricity experiment for this science fair project.

Why does honey crystallize? This science fair project project answers this question and identifies the variable that makes this sweet solute crystallize faster.

Help your fifth grader trace your family's roots and interview all the living mothers to create a makeshift, 3-D family tree!

Get your hands on a concoction that breaks the rules about what's a solid and what's a liquid.

How do you tell time without a watch? Use the sun! This simple activity will show your child how to build his own sundial.

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

How does a compass work? What's a magnetic field? Kids will build their own compass at home to find the answers in this great science fair project idea.

In this enlightening transpiration experiment, kids will explore how the loss of water from plants through transpiration contributes to the water cycle.

Help your first grader explore the world of scientific measurement by "weighing" fruit with a "water scale"!

Explore the craters, maria, and highlands on the surface of the Moon! In this fun science project you'll create a 3-D model of the moon using paper mache.

In this activity, your student will be invited to build a chair out of building blocks that is designed to meet the specific size and shape of a small doll or toy figure.

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

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

Kids learn about potential energy, and mechanical energy, and how to make power from water with one of our favorite renewable energy projects for kids.

Would it hurt to skip brushing your teeth just this once? Let's find out by seeing which foods produce the most mouth bacteria.

This science fair project idea explores the different properties of matter.

Your second grader will love this simple soda bottle race car activity. Make a ramp and customize your car for an entertaining way to learn scientific concepts.

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.

Demonstrate the properties of pressure and surface tension to explain how water can stay inside an upside down glass using cardboard.