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.

Will potatoes spud or sprout faster in dry, dark, or cold conditions? Find out in this science fair project idea!

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.

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.

Here is a fun middle school science project on factors affecting solubility. Learn how dissolved solids can "crash out" to form crystals when conditions change.

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.

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

Enter the buzz worthy world of bee watching and find out what time bees like to wake up!

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.

Understanding absorption means understanding why certain fibers and materials can absorb water! Kids will see absorption in action in this simple project.

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.

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

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!