In this science fair project, apply the principles of leverage and force by building six simple machines designed to set weights in motion.

This study evaluates if electronic devices commonly found in most households emit radiation, and if they do, how much?

Do you have your isopods straight? Learn about sow bug and pill bug behavior by building a terrarium to study them in!

Looking for an enjoyable evening activity you can do with your kids? Study the stars: help them learn about constellations by making one of their own.

The purpose of this study is to determine if people can tell the difference between organic and conventional food from looking at, smelling and tasting it.

Study the life cycle of the common blowfly as it relates to forensic investigation. Record the first time you see flies, maggots, and eggs.

The purpose of this science fair project is to study the properties of sugar and examine individual preferences for sugar and other sweeteners.

Collect meteorite dust with a magnet in your very own backyard! The objective of this science fair project is to gather meteorite dust to study outer space.

This science project challenges students to study deer behavior in their natural habitat- the feeding patterns, social behaviors, male to female ratio, etc.

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

This science project encourages students to investigate the Mozart Effect, the idea that classical music promotes learning.

Learn whether writing things down really makes things easier to remember.

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.

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

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

Grow a garden with an environmentally-friendly twist by using plant scraps that usually get thrown away.

The goal of this evaporation experiment is to learn about how different external conditions affect drying time.

Your child helps the environment while saving your family money in this fun and rewarding "Gas Guzzlers" competition.

Learn about the microclimate of your backyard by tracking rainfall, temperature, and observed weather with hand drawn charts and graphs.

Grow potatoes in a plastic bag—easy to grow and harvest, and yummy to eat!

Science fair project examining barometric pressure, and how it can be used to predict the weather. How does atmospheric pressures relate to weather conditions?

This science fair project idea determines the most effective method of preserving food.

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

This science fair project teaches kids experimental design and how to test if subjects can really sense if they are being watched.

Introduce your fourth grader to the concepts of solstices by observing the length of her shadow on the shortest day of the year, compared to other solstices.

Science fair project that examines how to grow bacteria in a controlled setting, using simple materials from around the home.

The goal of this science fair project is to analyze differences between the taste and texture of frozen and fresh food.

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

Do you love to make Jell-O? Find out in this science fair project idea if it is possible to make Jell-O with just warm water.

The purpose of this science fair project is to demonstrate how yeast, a fungus, causes bread to rise.