The objective this science fair project is to determine whether a bigger bag will allow a homemade hot air balloon to fly higher than smaller bag.

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.

This science fair project idea teaches how the gases and pollution in the air affect the earth's atmosphere temperature.

This science fair project explains the process of how the lungs expand and contract with the help of the diaphragm.

How do series and parallel circuits work, and which produces the brightest light in a light bulb? Construct both in this project and find out!

This science fair project idea investigates how the height at which a pendulum is released affects the length of time it continues.

This science fair project idea examines the reason boats are shaped and engineered.

This science fair project focuses on the use of the enzyme amylase found in human saliva to break down starch into sugar.

This science fair project demonstrates the magic of arches by challenging students to stack telephone books on top of eggs without breaking them.

This science fair project idea investigates whether plants can survive being frozen.

Are you ready to be a detective for science? Then get out your magnifying glass and start studying fingerprints!

This science experiment tests whether warm or cold water works best in making cut flowers last longer.

This science project teaches young students about germs, bacteria, and the importance of washing their hands. Students will test what is the best way to wash.

4th graders construct an ocean food web to learn about consumers and trophic levels, food webs, and food chains in this cool ecology science fair project.

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

This science fair project idea explores substances that cause a bubble to last longer.

This science fair project focuses on a polymer called hydrogel super absorbent crystal which absorbs water, swelling to many times its original size.

Science fair project which measures the shadow cast by a meter stick at various times in order to predict the circumference of the earth.

This science fair project teaches you about what makes persimmons so tart and how astringency can be removed by studying the effect of tannins on fruit.

For this science fair project, kids will learn how to make a lemon battery. They can conduct this classic experiment using readily available materials.

This science fair project uses paper chromatography to investigate whether black, brown, orange, and purple are pure colors or mixtures of other colors.

In this project students experiment with making music using only glasses of water.

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

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

Do lefties just write different or are their brains different? This science project has students explore what it means to be left handed.

In this popcorn experiment, students can explore how two things made out of the same material can have very different appearances and densities.

This science fair project idea explores whether talking to a plant will help it grow.

This science experiment tests why guacamole goes brown and if leaving the pit in will stop guacamole from turning brown.

In this science fair project, kids observe the expansion of liquids when frozen and determine if some liquids expand more than others in the freezing process.

The objective of this science fair project idea is to determine if sound travels best through the air, water or a solid.