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

In this windmill model science project, you will build a windmill to learn about wheel-and-axle machines and how these simple machines are used to do work.

This experiment investigates the relationship between the temperature of a candle and its burn rate.

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

Have your kid determine if a goldfish can be conditioned to expect food the same way Pavlov's dogs did with this fascinating science fair project.

This science fair project creates a visual model of whatâs happening to sound waves as a car approaches and then leaves.

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

This science fair project examines which fruits and/or vegetables will ripen prematurely when placed with ripe apples.

This experiment explores the question of whether age and/or gender play a role in people's ability to remember dreams.

The goal of this evaporation experiment is to learn about how different external conditions affect drying time.

This project examines Newton's First and Second Laws of Motion with a bicycle and water balloons.

It's not actually that hard to get energy from garbage! Kids learn how to make biogas in the form of methane with this cool and easy science fair project idea.

Check out this science project idea to compare organic produce to non-organic produce and how preservatives in food extend the shelf life of goods.

How does distance affect the spreading of light? Kids see diffraction and the inverse square law of light in action with this great science fair project idea.

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.

In this science fair project, learn how to make gears and find out why they transmit torques in predictable ways.

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

In this experiment, students find out what happens when a less-dense fluid interacts with a denser one, replicating the effect of cooler solid rock on magma.

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

In this science fair project, students create their own miniature salt flats at home.

Examine whether distilled water, spring water, or regular tap water yield faster plant growth.

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

Discover whether different amounts of water added into a wine glass will produce a different pitch when their fingers are rubbed along the rim.

Does putting soapy water on plants help or hinder plant growth? Kids learn about greywater and how it affects plant growth in this cool science fair project.

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

This project examines whether playing music during class helps students learn or if it distracts students from learning.

The purpose of this science fair project is to determine which conditions and materials quicken the composting process to make the best compost.

Examine the effect of pressure on carbonation in soda.

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.

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