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?

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

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?

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

In this science fair project, students use the streak test to tell minerals apart from each other.

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

When you rub a balloon on your head, your hair stands up; but is that true for everyone? Does hair color affect static electricity?

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?

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

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

Science fair project that determines whether lettuce that is harvested gradually yields more produce than lettuce that is harvested all at once.

This science fair project teaches students the differences between fruits and vegetables.

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

This science project challenges students to study deer behavior in their natural habitat- the feeding patterns, social behaviors, male to female ratio, etc.

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

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

Using a toy race car kids create a visual model of the Doppler Effect.

Learn how starch and carbohydrates interact with different solvents in this fun and easy packing peanut science fair project.

In this sound experiment children listen for differences as they tap on a bag of air, a bag of water, and a wooden block held up to their ears.

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

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

Why do plants wilt? Kids will learn to think critically about what environmental factors affect plants, and what plants need to survive.

Can you imagine a sky filled with bright, colorful bubbles? Make this whimsical scene come alive with bubble science!

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

In this science fair project, young children notice and track changes in trees throughout the year.

In this science fair project, students discover how sedimentary layers form as sediments like mud, silt and sand settle over time.

Do you think you can blow down a sand castle with a mighty wind? Find out which material stands up best to erosion in this erosion experiment.

What is a wedge? Kids find out by experimenting with different wedges in this simple science fair project idea.

Uh-oh! Is that a pill sitting on the counter or a piece of candy?

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.