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This science fair project idea explores how the shape of a boat affects its density and how much weight it can float.

Is it amplitude? Weight? Length of string? Kids will discover what factors changing the period of a pendulum depends on in this fun and easy physics experiment.

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

Check out this fun and easy 4th grade science fair project idea that tests how gravity induces positive and negative geotropism (gravitropism) in bean plants.

This science project lets students explore the number of spots on a ladybird and how to treat ladybugs with respect.

Construct and experiment with a periscope using reflected light rays to gather an image.

Learn how to demagnetize a magnet and how physics can explain this phenomenon with this enlightening science fair project.

In this activity, children will let their imagination run wild as they design and build a new planet in the solar system.

Does dough rise faster with unbleached or bleached flour? Investigate in this science fair project idea.

This science fair project idea produces sounds by creating vibrations using different objects.

This science fair project idea determines what household items are good conductors of electricity.

The objective of this science fair project idea is to determine if sound travels best through the air, water or a solid.

Can you increase the light and plant growth in your garden using mirrors? In this experiment, measure light reflection and find out!

In this fun science fair project idea, kids will experiment with various methods in order to discover the fastest way to cool a soda.

Create a DIY Electromagnet! Using a 9v battery to create an electrical field around a nail, students explore electromagnetism in this cool science project idea.

The goal of this project is to create an exciting topographical map out of dough.

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

This science fair project idea determines which method of hand cleansing is the most effective.

What animals are most popular? This project affords practice in data-collection, record-keeping and data-analysis through the investigation of this question.

Kids will learn about the interaction of lactose and lactase in milk and discover why we describe enzymes as catalysts in this fun science fair project.

Science fair project about work and energy which uses a simple mathematical formula to predict how far a jar will roll down an incline.

Want to see a great example of Newton's first law? Kids will learn about basic physics with this fun, ballistic experiment.

In this science fair project, students will try to discover if test subjects can detect the presence of Monosodium Glutumate (MSG) in food.

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

Science fair project examining barometric pressure, and how it can be used to predict the weather. How does atmospheric pressures relate to weather conditions?

Children combine an acid and an alkaline substance to simulate a volcano eruption in this fun experiment.

Science fair project that teaches you about chemical indicators and how to make your own in order to identify various mystery solutions.

This science project teaches students to classify different shapes of leaves.

This science experiment examines the role of fat in food, especially in making bread rise and whipping cream.

Discover how to make fake snot with this cool science fair project idea to learn about polymers, enzymes, and more.