Learn how to tell time by the sun with this cool science fair project idea that tracks how the accuracy of a sundial changes over time.

In this exciting and empowering challenge, your child will construct a bridge using marshmallows and toothpicks!

Magnets vary in strength. Have your young scientist figure out which kind of magnet is the strongest when you have him conduct this attractive experiment.

Science fair project that explains and demonstrates the parallax principle.

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.

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

Ready for takeoff! Make science fun and teach about levers and fulcrums as your child sends buttons flying.

In this activity, your child will be asked to create a boat that can successfully float while holding 25 pennies.

This science fair project idea investigates how color affects temperature.

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

Learn how to convert gravitational potential energy into mechanical energy in this fun science fair project idea.

This science fair project idea explores if the length of the string that an object is suspended on has an effect on how fast or slow it swings.

This science fair project idea teaches that time always passes at the same rate and nothing we do in our daily life âreallyâ affects how fast it moves.

Set your young chemist up for an afternoon of science-fueled magic with a deceptively simple activity starring baking soda and vinegar!

This project compares the strength of one, two, and three-ply toilet paper.

This science fair project collects information on the Internet about yourself and others.

What causes the seasons to change? Kids find out by modeling the earth's tilt using a globe, flashlight and graph paper in this cool science fair project idea.

In this experiment a spectrometer is used to analyze the light emitted by burning ion solutions.

If your science savy third grader is up for a challenge, let her bend light with a casserole dish!

Here is a kindergarten activity that blends art and science by using magnets, paint, and objects found around the house to create a picture.

This science fair project idea investigates if heat from direct sunlight is hotter than heat from reflected sunlight.

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 experiment, students will create their own version of coquina, a sedimentary rock thatâs formed by seashells and sand, cemented by seawater minerals.

What happens when "coffee-addicts" miss coffee for 1 day? Find out in this science fair project idea!

Ignite your kindergartener's love of adventure and learning with an imaginary trip under the sea.

This potato cannon activity teaches your middle schooler about the principle of Boyle's Law. Make a potato cannon and have a blast learning about science.

Make a bear cave for your child to play and explore, learning about bears and winter hibernation.

Learn about Ikebana, or the Japanese art of flower arranging, with your child while artfully arranging spring flowers!

You don't need to wait for rain to see a rainbow. Make one yourself, and teach your child about light and weather in the process.