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.

In this free science fair project, learn how to separate salt from water using heat. A great science project for elementary school kids.

Water, along with soil and light, is a necessary component for plant growth. So what's better for promoting plant growth: tap water, or rain water?

Use pepper and soap to discover some fun facts about the properties of water.

In this cool engineering science fair project, kids learn how to build Hero's engine: an enlightening example of Newton's third law.

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.

Be a chemist for a day and study the simple reaction between sugar and heat. Try heating sugar and see what happens!

This project demonstrates the correspondence between the volume of water displaced by a submerged object and the volume of the object displacing it.

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

Most people assume that cold water freezes more quickly, but could that be false? Does hot water freeze faster than cold water? Let's find out!

Do you love to make Jell-O? Find out in this science fair project idea if it is possible to make Jell-O with just warm water.

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

The goal of this fun science fair project idea is to microwave candy and investigate: do some colors of M&Ms melt faster than others?

Kids will learn how to make a thermometer to to explore liquid density in this great science fair project. Which liquids are affected by temperature the most?

This science fair project idea investigates which objects float and sink in honey, water, and oil.

Tired of gum with flavor that lasts for just a couple of minute? Put gum to the test with this chewy science experiment!

This science fair project idea investigates emulsifiers that allow oil and vinegar to mix.

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

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

Kids construct a single fixed pulley system to learn how pulleys can make work easier in this cool physics and engineering science fair project idea.

In this experiment you will replicate the mummification process by making a hot dog mummy.

Learn whether Mylar Balloons last longer than Latex Balloons or vice versa.

In this air pressure science experiment with a balloon and a jar, children will use heat to create a partial vacuum and suck a balloon into a jar.

Kids will make a beautiful rainbow in a jar and learn what enables different types of liquids to remain distinct in separate layers.

This is a quick, easy science fair project that conveys the idea of density to preschool and early elementary children.

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

These science fair experiments demonstrate the chemistry of rust and the oxidation process.

How do animals keep warm? In this experiment, find out whether fat insulation resists cold temperatures and learn how this works in the animal kingdom.

This project is a vivid, concrete introduction to the basic but important idea that plants need sunlight and water to grow.

Why doesn't the ocean freeze? Students answer this question by simulating the chemical composition and temperature of arctic waters in their own home.