In this science and engineering activity, children will explore types of tunnels and their purposes and then design and build a tunnel of their own.

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 goal of this science fair project is to discover the science behind carbonated soft drinks and apply this knowledge to create a new one.

Science fair project that examines the different types of precipitation, evaluates the density of snow and calculates the ratio of snow-to-liquid.

Learn whether writing things down really makes things easier to remember.

Have your child build a model of a coral polyp, one of the tiny animals that composes a coral reef.

This science fair project investigates whether tapping the top or the side of the can will stop a vigorously-shaken can of soda from exploding.

An home science experiment for older students that teaches about the science behind heat.

The goal of this science fair project is to analyze differences between the taste and texture of frozen and fresh food.

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

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

How sensitive is your skin? Here's a fourth grade science experiment that lets your child figure it out.

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 idea examines whether boys and girls differ in reflexes.

In this activity, your child will be challenged to create a device that protects an egg when it is dropped from a height of about 10 feet.

Collect meteorite dust with a magnet in your very own backyard! The objective of this science fair project is to gather meteorite dust to study outer space.

This science fair project idea examines whether the colors of the spectrum respond differently in the thermal aspect when radiated by the sun.

In this project, all you need is a protractor to learn how to use the altitude of Polaris to find latitude on Earth. Polaris is also known as the North Star.

In this science fair project, students make their own rain gauge to measure rainfall.

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

This simple "how to make a water wheel" activity makes physics come alive for your child by demonstrating how different kinds of energy work.

Science fair project that examines how winter storms form and the relationship between temperature, moisture and snow.

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

This science fair project idea explores whether it is easier to balance on a narrow ledge or on a rope.

This science fair idea examines hydrogel superabsorbent polymer crystals. They can absorb 500 times their weight in water. Can they absorb other liquids too?

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

In this activity your child will create their very own marble maze!

The rock cycle will come alive for your child when he uses broken crayons to create the three basic rock types.

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