Kids will learn how to clean fish tank the natural way. Add catfish to the tank and see if your water gets cleaner.

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.

Science fair project about work and energy which uses a simple mathematical formula to predict how far a jar will roll down an incline.

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

Certain fruits can change gelatinâs ability to set. In this experiment, kids will discover what happens when gelatin meets pineapple enzyme.

Science fair project idea examines validity of mood ring predictions. Analyze accuracy of results, consider the impact of temperature

How does water pressure change with depth? Kids learn how pressure works underwater with this cool and easy demo.

Science fair project which uses coins flips to visually demonstrate the probability of an event and how to express it.

This science fair project uses paper chromatography to investigate whether black, brown, orange, and purple are pure colors or mixtures of other colors.

The objective of this science fair project is to experiment with balancing everyday objects and observing the the effects of gravity on materials.

This science fair project creates a visual model of whatâs happening to sound waves as a car approaches and then leaves.

Science fair project that teaches you about chemical indicators and how to make your own in order to identify various mystery solutions.

This science fair project idea determines if the size of the parachute will change the rate at which an object falls.

Test your friends to find out if you can replicate the placebo effect's incredible results.

The objective this science fair project is to determine whether a bigger bag will allow a homemade hot air balloon to fly higher than smaller bag.

Marshmallows are made of sugar, water, and air pockets. Since the marshmallow is flexible, will air pressure cause it to expand when heated in a microwave?

Kids will learn about the interaction of lactose and lactase in milk and discover why we describe enzymes as catalysts in this fun science fair project.

Science fair project which measures the shadow cast by a meter stick at various times in order to predict the circumference of the earth.

In this fun experiment, we'll find out how color affects heat absorption!

Science fair project which simulates the global conveyor belts on a small scale, and observes the effects of wind, density and temperature on water movement.

Students explore hot desert plant adaptations in this cool science fair project by observing how these organisms prevent excessive transpiration.

Wiggly worms are known for staying buried in the soil, but how does that affect plants? Are earthworms and plant growth related?

This science fair project looks one of the most important factors affecting seed germination: water. A fun and easy plant biology experiment for 3rd graders.

This science fair project idea provides evidence that air is everywhere and takes up space.

Could there be toxic chemicals lurking in the cupboards and closets of your home?

For this science fair project, kids will learn how to make a lemon battery. They can conduct this classic experiment using readily available materials.

Science fair project which measures whether tsunamis are more destructive when they are caused by an earthquake or by a meteor.

Does electricity move better through thick wires or thin ones? kids will conduct this classic electricity experiment for this science fair project.

Brine shrimp usually live in saltwater. Investigate how salt concentration (salinity) affects the rate at which brine shrimp eggs hatch.

This science fair project idea explores whether mint, known for its âcooling sensationâ really does lower temperatures.