This science project uses Mohsâ Hardness Test to show kids how to compare the hardness of different types of minerals.

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

In this enlightening transpiration experiment, kids will explore how the loss of water from plants through transpiration contributes to the water cycle.

In this cool science fair project idea, kids conduct the ruler drop test on volunteers to determine whether reaction time can be improved with practice.

This science experiment tests if dog saliva can really help heal wounds.

Discover flight initiation distance as you play around in the park with this fun bird watching project!

Test out the pH levels of soil in your backyard versus soil in more wild environments to solve this science case.

In this exciting design challenge, your child will use design thinking skills to create a mixture that can inflate a balloon.

Kids learn how to prevent erosion by growing grass. They'll test soil with grass against raw soil in this revealing science fair project idea for 4th grade.

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

Do different types of oil mix or stack? Find out in this science fair project idea!

Find out which kind of bubble wrap fares best when put in impact.

Find out whether packaged seeds actually do expire in this new science fair project idea.

In this science fair project, kids start a chemical reaction that will make a balloon inflate itself!

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

Will increasing the amount of salt in water effect how slow or fast the water freezes?

This science fair project idea explores whether a plastic slinky works as well as a metal slinky when walking it down the stairs.

Determine if gender affects the ability to identify different smells.

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

Did you know your body is full of simple machines? This project looks at one of the third-class levers in the human body: your arm!

In this design challenge, your child will create a parachute for a small toy using typical household items.

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

What's the science behind those out-of-sight roots? Find out if you can trick roots into growing in different directions.

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

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.

Gather some friends for a bubbly soda taste test do determine calories' role in your favorite drinks.

This science fair project idea examines which type of insulation holds in the most heat.

This science fair project idea explores the different properties of matter.

This project determines what category of person is most likely to be ticklish.

Examine the effect of pressure on carbonation in soda.