Future engineers, unite! Discover how to keep a sandcastleâs bridge from falling into the moat.

How would you dry your wet clothes if your dryer didn't work? Find out with this fun experiment!

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

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

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

Find out whether a longer airplane will fly farther or a wider paper airplane.

This project explores whether nails, toothpicks, straws, or pen nibs are best for applying ink to paper.

Discover whether different amounts of water added into a wine glass will produce a different pitch when their fingers are rubbed along the rim.

This project determines whether Styrofoam, paper, or plastic cups are best for preventing ice from melting.

This science fair project idea highlights decomposition rates by comparing how long it takes an item to decompose in a compost pile vs. a landfill.

Learn whether Mylar Balloons last longer than Latex Balloons or vice versa.

This project investigates the affect of storage temperature on microwave popcorn.

What is elasticity? Students will investigate how this concept applies to bouncing ball physics by testing the bounces of balls made out of different materials.

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

This science fair project idea determines if the size of the parachute will change the rate at which an object falls.

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.