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Kids will make a beautiful rainbow in a jar and learn what enables different types of liquids to remain distinct in separate layers.

This science fair project idea investigates how color affects temperature.

This science fair project idea determines which method of hand cleansing is the most effective.

Do plants get crowded? Have your curious kid investigate how plants respond if they're forced to grow together in a confined space.

In this science fair project, kids will be able to see where germs reside on their hands while gaining insight into the benefits of thorough hand washing.

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

Check out this cool science project idea to learn about rocks and explore the cycles of formation, breakdown, and reformation of rocks in the Earth's crust.

The objective of this science fair project is to observe the differences in heat absorption for darker colors vs. lighter colors.

Do you think heat can affect a plant's growth rate?

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

Kids will make predictions about cricket behavior by conducting this fun and easy experiment which simulates different environments for crickets.

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

The objective of this science project is to determine the length of time for different seeds to germinate.

This science fair project idea experiments with spinning color wheels and optical illusions.

Check out this fun science fair project idea for 1st grade: a solar eclipse model that demonstrates total, partial, and annular solar eclipses.

This science fair project idea demonstrates how air resistance contributes to denser objects falling faster than less dense objects.

Set off an a science adventure as you prepare a row of bee homes for your new visitors.

This science fair project looks one of the most important factors affecting seed germination: water. A fun and easy plant biology experiment for 3rd graders.

In this free science fair project, learn how to separate salt from water using heat. A great science project for elementary school kids.

This science experiment examines the role of fat in food, especially in making bread rise and whipping cream.

The goal of this fun science fair project idea is to microwave candy and investigate: do some colors of M&Ms melt faster than others?

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.

This science fair project idea demonstrates that plants give off water.

Be a chemist for a day and study the simple reaction between sugar and heat. Try heating sugar and see what happens!

This science project challenges students to learn about and classify weeds and discover new practical uses for weeds.

This experiment has students record rat behavior to learn about the benefits of rats and research rat myths throughout history.

In this air pressure science experiment with a balloon and a jar, children will use heat to create a partial vacuum and suck a balloon into a jar.

This project examines if computer screen and text color affect retention and if people subconsciously prefer combinations of colors that help their retention.

Show your preschooler how to make a print of a butterfly using her hand as a tool--a great way to stimulate her sense of touch.

What is persistence of vision? With this hands-on science fair project idea, students will demonstrate this cool and dramatic phenomenon in their own classroom.