Check out this cool science fair idea on why hard fruits become soft and learn how to compare the sugar content between ripe and unripe fruits.

This science fair project idea investigates the ability of different whitening toothpastes to whiten teeth.

Research optical illusions and human auras. Understand why the probable cause of perception is mach bands.

Place mushroom caps on poster board, label samples. Check beneath mushroom caps for "prints" of spores. Record and interpret prints left behind.

Demonstrate the principle of jet propulsion in this science fair project by building a rocket from household materials.

Science fair project that explores the variety of webs that spiders weave and collect specimens for identification.

Wind is an important source of renewable, green energy. The purpose of this science fair project is to build and operate a windmill generator.

Explore the negative and positive consequences of stereotypes.

Determine which metal has the highest rate of conductivity.

Science fair project which measures the amount of heat energy released by a burning candle by calculating how many calories of heat it emits.

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.

Devise list of randomly chosen words, test how many words volunteers can remember. Compare results of adults and children. Which have better memories?

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

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

This science fair project idea is develops a modern interior lighthouse design and encourages lighthouse preservation and restoration.

This science fair project idea determines if family members can recognize one another using only the sense of smell.

Prove that the Earth is not flat. The objective of this science fair project is to measure the angle of the sun and calculate the circumference of the Earth.

Explore the best way to store popcorn kernels. It examines the impact of moisture and temperature on unpopped kernels.

Examine how the tire treads of a bicycle affect its rolling frictional force. Change tires, test speed performance on different terrains.

Study the effect of music on random rote memory. Examine the practical application of music in learning and education.

In this investigation, an oil spill is simulated in a jar to observe the damage that oil spills have on the ocean and ocean life.

The project idea is to understand how sugar effects brain chemistry.

This science fair project idea determines the properties of rainwater and examines the techniques for harvesting rainwater.

Ever wondered how a plant drinks water? This science project will teach you how and help you create a beautiful floral display!

This science fair project idea investigates if fats add to the flavor of food.

This science fair project idea explores plant growth from a bulb, root, and a stem and investigates asexual plant reproduction.

This project examines germs and their spread in households. The goal is to learn how to stop the spread of germs and other diseases.

What combination of cloth and stain will be the easiest for removing stains? Test and experiment!

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

This science fair project idea investigates how the height at which a pendulum is released affects the length of time it continues.