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.

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

In this science fair project, students will create a model of a shoreline, observe erosion and examine how jetties prevent erosion.

Let your fourth grade chef mix up butter and sugar with scientific principles about different states of matter, and get delicious toffee, too.

Students will investigate the thermal conductivity of metals by learning how to measure thermal conductivity with this fun and easy 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.

Science fair project which tests various sedimentary, igneous and metamorphic rocks to find out whether one rock family is stronger than the others.

The objective of this science fair project is to analyze the effects of salinity and temperature on water.

Science fair project which determines if plants really do need water to grow, or whether they just need to be kept wet.

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

How well can people recall what they have observed. Test your knowledge in this fun experiment.

Make a spring collage with your child to get them outside and those creative juices flowing!

In this fun science project, learn about what happens to cut fruit and experiment with how to stop apples from turning brown.

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 kinesthetic learning activity will help your fourth grader get a firm grasp on the immensity of the solar system.

This science project encourages students to investigate the Mozart Effect, the idea that classical music promotes learning.

Let your fabulous crafter use their favorite flowers, fruits and herbs to whip up a delicious perfume that they can proudly present to a friend or a loved one.

Your child helps the environment while saving your family money in this fun and rewarding "Gas Guzzlers" competition.

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

In this activity, students will create a stop motion animation by creating a clay figure and taking a series of digital photographs.

To help your child learn how to use a thermometer, try this temperature collecting activity at home.

Help your child learn about animal classification with this fun and delicious activity.

This science fair project on testing water hardness is a great introduction to practical chemistry. Test and learn the difference between hard and soft water.

Learn how to make a ping pong ball anemometerâa device used to measure wind speedâin this free science fair project idea.

This science fair project uses paper chromatography to investigate whether black, brown, orange, and purple are pure colors or mixtures of other colors.

This is a fantastic and easy science experiment where kids will learn about elasticity by testing how high bouncy balls of different materials can bounce.

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.

What's the chemistry behind dyeing Easter eggs? Will adding vinegar to dye help the eggshell absorb the color? This colorful science project has the answers!

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

What chromosome combinations determine a fetus gender? Use probability to think about whether a sperm and ovum will create a male or female in this project.