In this free science fair project, build a star clock and learn how to tell time on a clear night by observing the big dipper!

The apparent movement of the sun has been used to keep time since the bronze age. In this science fair project, kids plot solar time against mean solar time.

We all know that the Moon has different phases, but it can be hard to figure out why. Try this activity to see how the Moon's phases really work.

This science research project challenges students to think of more effective lobster farming methods.

This science fair project idea recreates the movement of planetary bodies in order to learn why they sometimes appear to move backwards.

What is a barycenter? Kids learn how gravity and mass influence the orbit of binary systems like planets and moons or stars and planets in this cool experiment.

How does water pressure change with depth? Kids learn how pressure works underwater with this cool and easy demo.

Wool can absorb 1/3 of its weight in water, while still keeping the body warm. She can test this theory by performing a scientific sock comparison!

All you need are pencils, paper and some scissors to get started on this easy and fun game to review astronomy information, or other types of study concepts.

Beetles come in many shapes and colors. Here's how your second grade child can create his own beetles to paint and play with!

Science fair project that determines how UV radiation emitted by the sun varies depending on the time of day, using a handheld UV detector

Compare air temperature with the infrared temperature from a reflecting surface at different times of the day, in shade and in sunlight.

Children will learn why and how to compost as they help with the process of filling their compost, turning it, and observing the changes that occur.

Try this arts and crafts activity with your preschooler: make bread from yeast dough to teach her about the science behind bread baking.

Creating a home for a toad is an easy and fun project for kids. Here's how to make your very own toad abode.

In this activity your child will make a coiling snake out of simple household materials, and also find out why they coil.

The objective of this science project is to determine the relationship between carbon dioxide gas and the temperature of the atmosphere.

Learn how to make a weathervane with this fun and simple meteorology project for fourth graders.

This science fair project idea investigates whether rocks containing geodes can be determined from the outside.

Here's a simple science activity that will help your child better understand how wells bring us water.

Do heavier objects fall faster than lighter ones? Students learn the answer by watching the effect gravity in a vacuum has on a coin and a feather.

How do organic materials become soil? This science experiment measures what materials biodegrade.

Learn about the greenhouse effect- and get great science fair experiment ideas. Read more.

Recreate the fantastic phenomena of solar eclipses with your child using just a flashlight, a quarter, and her very own face!

The Galileo inclined plane physics experiment was one of the first ways scientists calculated acceleration due to gravity. Do it yourself in this project!

This science fair project idea explores what it takes to create a biosphere, or a self-sustaining ecosystem.

Science fair project which compares the rate of temperature change and the maximum temperature as a result of the angle of light radiation.

In this experiment you explore how tectonic plates move to create land and expand bodies of water.

Develop a new system for predicting geographic changes. Demonstrate the nature of geographic change. Make logical predictions.

Learn about the microclimate of your backyard by tracking rainfall, temperature, and observed weather with hand drawn charts and graphs.