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Can a toy car determine the strength of a magnet? In this cool magnet science fair project, young scientists will learn how to measure the strength of a magnet.

Has your kid noticed how much bigger the moon looks when it's low in the sky? Here's an activity you can do to show them that it's just an optical illusion.

Can you increase the light and plant growth in your garden using mirrors? In this experiment, measure light reflection and find out!

Show your fourth grader how to see her heart in action. Make a simple device out of a drinking straw and clay to help her spot the movement of her pulse!

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

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

Prove that the Earth is not flat. The objective of this science fair project is to measure the angle of the sun and calculate the circumference of the Earth.

An hour glass, also known as a sand clock, keeps time. In this activity, your child will make her own sand clock and measure the time it keeps.

Find the North Star, and measure your latitude! The purpose of this science fair project is to find latitude and learn about geographic locations.

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

examine how passive solar heating works, measure temperature in a parked car on a sunny day. ways to use passive solar heating as an alternative, energy

What does a raindrop look like when it splashes on the ground? Is each raindrop unique like snowflakes? Find out how raindrop size varies in this experiment.

This science fair project idea investigates how optical distances change the apparent size of an object as seen through a magnifying lens.

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

This science fair project idea measures out the sugar of various foods and find out whether people can correctly determine how much sugar is in common foods.

Incorporate some math and science thinking into your annual fall fun with this pumpkin investigation activity! Your child will have a blast investigating various ways of measuring pumpkins, making estimates, taking measurements, and recording their findin

Introduce your fourth grader to the concepts of solstices by observing the length of her shadow on the shortest day of the year, compared to other solstices.

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

With this science fair idea, little scientists will gain valuable insights into the physics behind throwing a baseball.

This science fair project idea explores the egg's thin membrane.

Did you ever add salt to pasta? Did it help cook the pasta faster? If not, find out in this science fair project idea.

Science fair project that teaches you about chemical indicators and how to make your own in order to identify various mystery solutions.

This study evaluates if electronic devices commonly found in most households emit radiation, and if they do, how much?

In this physics project, learn about the relationship between light intensity and distance using a laser pointer, flashlight, and graph paper!

This science fair project idea researches the different layers of the atmosphere and creates a visual representation of the atmospheric layers.

This light bulb science project includes step-by-step instructions for testing the heat from different light bulbs.

In this 3rd grade science activity, you'll experiment with the little-known fourth state of matter: polymers! Mix borax with white glue and watch what happens.

This homemade barometer allows your little scientist to contemplate and compare different air and weather conditions.

This easy aerodynamics activity is a simple way to introduce kids to the scientific method.

This science fair project explores how osmotic pressure forces water through the root up into the plant.