This experiment evaluates how a diet that is rich in "mood-enhancing" foods affects the way people feel over several weeks.

In this experiment two environments will be compared: a room with interior design that uses correct Feng Shui versus one with incorrect Feng Shui.

This science fair project idea teaches about the size of two different systems: the solar system and an atomic system.

This classic children's game-connecting two cups with a string-demonstrates sound's ability to travel through air vs through a solid.

In this fun science fair project, make two different scale models of our solar system using Astronomical Units and planets' relative size!

This project examines who can jump higher, boys or girls, younger people or older, and how these two factors, gender and age, interact with one another.

Learn about how we localize objects and beings in space through sound and about monaural auditory mechanisms and binaural auditory mechanisms.

Science fair project that studies how perfumes are made in order to determine how we can capture a scent.

The objective of this experiment is to evaluate which types of people are most impacted by the McCollough effect.

Test products which claim to reduce wrinkles, and determine which is the most effective. Test effectiveness over three weeks, using a sample of volunteers.

Create an organic plastic product using vinegar and cream. Track decomposition over course of several weeks. Compare decomposition with traditional plastics.

This science fair project idea studies the differences in gender perception between people.

Science fair project that studies how the brain transforms man-made symbols into meaningful concepts.

This science fair project idea studies past and current fads and trends.

Analyze competed scientific studies to determine the effectiveness of ancient remedies. Create a chart that illustrates the effectiveness of these treatments.

This science fair project idea studies how talking on a cell phone affect driving?

This science fair project idea studies whether a religious sleeping schedule relates to a higher IQ.

This experiment evaluates if personality influences whether a person prefers dogs or cats.

This science fair project studies whether DSLR and Point-and-Shoot cameras work the same way under all conditions.

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

This science fair project idea studies the acidity of rain water and whether the acidity is the same on all rainy days or does it fluctuate.

This science fair project studies which color(s) of flowers butterflies & bees are attracted to and if color plays a role in flower selection for pollination.

This project explores how and how much one family can reduce the amount of garbage they accumulate over a three month period.

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 science fair project idea studies whether eating a hearty breakfast before and exam will get them better test scores.

This science fair project teaches you about what makes persimmons so tart and how astringency can be removed by studying the effect of tannins on fruit.

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

This science fair project idea studies which brand of wintergreen candy produces the most sparks in the dark.

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