Check out this fun and easy 4th grade science fair project idea that tests how gravity induces positive and negative geotropism (gravitropism) in bean plants.

This experiment explores the question of whether age and/or gender play a role in people's ability to remember dreams.

Kids explore how a single movable pulley can confer a mechanical advantage over a fixed pulley in this cool engineering science fair project for 2nd grade.

This fun science fair project for 8th grade demonstrates what Kepler's 3rd law predicts about a planet's orbital period and its distance from the sun.

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

This project determines whether hands-on practice, mental practice, or no practice leads to better shooting of free-throws.

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

This experiment will explore the best way to create a perfect soft-boiled egg.

This experiment will explore if magnetism has any effect on the regeneration abilities of flatworms.

Watch pre-packaged seeds and seeds taken from inside fruits and vegetables grow. Which ones will grow faster? Read more in this science fair project idea.

Free science fair project idea examining how different types of water affect plant germination and growth.

This project examines the amount of saltwater required to affect the growth of plants and subsequent effects on growth and development.

In this science fair project, students examine how the flow rate in a stream affects the growth of aquatic plants.

This project concerns activity happening millions of miles away, on the sun.

The objective of this science fair project idea is to find out whether refrigerating cosmetics will extend their shelf-life and longevity.

In science fair projects, middle school students discover why nitrogen fixing bacteria are important to plant growth.

This science fair project idea discovers if an artificial light source will yield the same plant health and growth rates as light from the sun.

Science fair project in which you will build your own algae photobioreactor which will meet the physiological requirements of algae for maximum growth.

This science project involves comparing the relative effectiveness of salt, pepper and dehydration in food preservation.

This science project researches the correlation between barometric pressure and wind velocity.

This science fair project idea determines if the color of light affects the growth of plants.

Determine if certain colors of light are more effective for photosynthesis. Plant seeds in cardboard boxes with different light, record visible growth.

Free science fair project idea that measures change in flexibility with age, using a variety of flexibility tests like Sit & Reach.

This science fair project examines how carnivorous plants digest insects, and whether the plant can use nitrogen in the soil to compensate for lack of insects.

Examine whether distilled water, spring water, or regular tap water yield faster plant growth.

This science fair project tested various nose cones to determine which would be the most ideal shape for propelling a water rocket.

This science fair project aims to examine the nature of pi and analyze other properties and values related to circles, such as radius, diameter

Science fair project that demonstrates that rotting food attracts insects that lay eggs on it.

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