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

This science fair project researches the most effective method to cut an onion and stay tear-free.

This science fair project idea determines which flower lasts the longest.

What can you do with hair after its cut? This science project teaches you practical uses for human hair.

In this fun science project, learn about what happens to cut fruit and experiment with how to stop apples from turning brown.

When you cut a flower to put into a vase, it'll eventually wilt, even with water and sunshine. But is there another scientific secret to keeping flowers fresh?

Determine the growth rates of different types of human hair. Ask volunteers to not cut their hair until the end of experiment. Measure hair length.

Learn about magnifying glasses, concave lenses and inverted images by sending rays of light through a magnifying glass in this cool science fair project!

Plants need water to grow. In this project we learn how plants transport water from their roots to their leaves

In this fun design challenge, your child will get creative with making structures out of toothpicks and gumdrop candies.

Explore the craters, maria, and highlands on the surface of the Moon! In this fun science project you'll create a 3-D model of the moon using paper mache.

This project explores the effectiveness of various common household ingredients in cleaning tarnished and oxidized coins.

Kids use applied math to build and test a parabolic mirror solar hot dog cooker in this cool engineering science fair project idea for middle school.

This science fair project determines which type of physical activity most improves memory.

This science fair project idea investigates the relationship between memory and age.

Kids learn about the color rendering index by finding the best lightning for makeup in this fun and original physics science fair project idea.

This classic children's game demonstrates how sound travels through air vs. through a solid.

In this project students learn about the golden ratio and investigate if it can be used to predict people's assessment of beauty in others.

This science fair project creates a visual model of whatâs happening to sound waves as a car approaches and then leaves.

In this activity, your child will be challenged to use simple materials to create a catapult for a small, lightweight toy.

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

In this exciting and empowering challenge, your child will construct a bridge using marshmallows and toothpicks!

Magnets vary in strength. Have your young scientist figure out which kind of magnet is the strongest when you have him conduct this attractive experiment.