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.

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

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

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.

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

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

This research project teaches students about synesthesia, a neurological condition that causes sensory overlap.

Store seeds under three different environmental conditions. Plant seeds in carefully marked groups, watch them grow. Compare results.

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

Find out whether pacing in long-distance running actually acquires for drastic changes in finishing times versus running super-fast at the start.

This science fair project idea investigates the difference in reaction times between boys and girls.

Research historic methods of food preservation. Analyze alternative recipes and techniques of food preservation. Document success with photographs.

This science fair project idea produces varying pitches of sound.

Examine which metal conducts more heat by boiling water in 3 pans made of aluminum, copper, and stainless steel.

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.

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

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

Explore the negative and positive consequences of stereotypes.

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

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.

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

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

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

Design and build a scale model representing living tree architecture. Then build a full-size version using one or more lives trees, and test your creation.

examine how passive solar heating works, measure temperature in a parked car on a sunny day. ways to use passive solar heating as an alternative, energy

Science fair project that helps you better understand density by comparing the relative densities of cans of Coke and Diet Coke.