Build an electroscope, a simple device that measures static electricity, or the freely flowing electrical charges of the atmosphere!

This experiment will explore whether adding different substances to a gel affects its strength.

In this experiment, students create music with subliminal messaging to try to influence people's decision-making.

This experiment will determine how different kinds of light affects the strength of bakerâs yeast.

Boys might wrinkle their noses at the thought of gardening, but we guarantee they'll like this activity! Make a recycled terrarium full of bug-eating plants.

Students pit the heat capacity of water against the heat capacity of oil while looking at the effects of dipole rotation in this cool science fair project idea.

Explore concepts in current and coltage with these Van de Graaff generator experiments.

In this science fair project caffeine will be extracted from Gunpowder Green Tea, illustrating the isolation of a naturally occurring product from a plant.

Learn about sound physics and do a survey experiment to explore the difference between sound and noise in this science project.

Science fair project that examines search engine optimization, internet search trends using a statistical study of searched keywords.

This project compares test subjects' responses to whining and other "attachment" and attention-getting sounds to determine which sounds are most distracting.

This project will explore whether people are emotionally susceptible to suggestions of both humor and sorrow.

This project explores if people more easily distinguish between faces of people of their own race or ethnicity compared to those of other races or ethnicities.

This project explores whether similar type movie scenes are accompanied by music with similar characteristics.

This science fair project idea examines if there is a reason that musical notes are at the pitches they are.

Science fair project which tests various sedimentary, igneous and metamorphic rocks to find out whether one rock family is stronger than the others.

Learn about the role of Earth's rotation on the Coriolis Effect and hurricanes in this science project. Model the Coriolis Effect on a hurricane's direction.

The goal of this science fair project is to investigate the effect of irradiation on the germination and growth of vegetables, such as the tomato plant.

The objective of this science fair project is to determine whether planaria reproduce asexually by regeneration.

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.

This cool air pressure demonstration has kids break a ruler using only a newspaper and atmospheric pressure.

In this cool science fair project, kids apply basic algebra to learn how to make a PVC pipe instrument while exploring concepts like frequency and resonance.

Kids will build a turtle habitat in order to observe the climate preferences of this cold-blooded reptile.

Determine how salinity affects the circulation of warm and cold water. Note whether the warm water mixes or forms a layer with cold water.

This science fair project compares the abilities of men and women to understand subtle communication through body language.

This science fair project on testing water hardness is a great introduction to practical chemistry. Test and learn the difference between hard and soft water.

Learn how to make a ping pong ball anemometerâa device used to measure wind speedâin this free science fair project idea.

Here's a science activity to help your child investigate how seeds are designed to travel.

This science fair project idea models industrial oil spills and determines if they have an impact on wildlife living beneath the surface of the water.

Wonder why bugs always fly around your lights at night? This experiment determines whether insects are attracted to the heat or the light.