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.

Science fair project that uses muriatic acid to develop fingerprints that would otherwise be invisible.

Perk up your front porch with this hanging vase craft, perfect for spring and for getting kids outdoors!

Discover which fabrics shrink the most in the wash and why.

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

Does dough rise faster with unbleached or bleached flour? Investigate in this science fair project idea.

In this science fair projects, students will grow out the bacteria that collect on air conditioner filters.

Grow potatoes in a plastic bag—easy to grow and harvest, and yummy to eat!

In this activity, your kid will watch coal turn into crystals right before her very eyes, and learn some science along the way!

Will storing cucumbers and tomatoes in the fridge destroy their unique flavors? Find out in this science fair project idea!

What chromosome combinations determine a fetus gender? Use probability to think about whether a sperm and ovum will create a male or female in this project.

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.

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

This science fair project examines how seeds hitchhike on animals and clothing.

This science fair project idea researches how your choice of clothing affect how hot or cool you feel during the day.

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.

This science fair project idea explores whether boiling and freezing water will have an effect on how much it weighs.

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

Find out whether putting something on top of a plant will inhibit its growth.

If your fourth grader is obsessed with all things glow-in-the-dark, then here's an activity that will really light up her imagination!

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

In this investigation, three different juices are tested to determine which juice contains the greatest amount of vitamin C.

In this project, a magnet is used to collect iron from breakfast cereals.

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

Science fair project that determines whether tapping a pomegranate with a spoon helps it release its seeds.

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

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

This science fair project idea creates cool new colorful fabric pattern designs and experiments with the mixing of colors.

Construct batteries that make electricity from fruits with this fun science fair project.

This science project teaches students about organic farming and the benefits and disadvantages of commercial plant food.