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

Salmonella and E.coli are common food contaminates. This experiment measures the time it takes for E.coli and Salmonella to reach hazardous levels in fish.

Use a fish tank to simulate a pond! This science fair project explores the relationship between acid rain and the dissolved oxygen concentration of water.

Kids learn how fiber optics work with a dramatic total internal reflection experiment using a fish tank, water, and a laser pointer.

Have your kid determine if a goldfish can be conditioned to expect food the same way Pavlov's dogs did with this fascinating science fair project.

Science fair project that uses muriatic acid to develop fingerprints that would otherwise be invisible.

In this pinto bean germination experiment, you'll learn about how fertilizer aids in growing pinto beans into seedlings.

In this science experiment, do tensile strength test on fishing line, a strand of hair, a rubber band, and any other materials you're curious about!

4th graders construct an ocean food web to learn about consumers and trophic levels, food webs, and food chains in this cool ecology science fair project.

This science fair project idea identifies and understands adaptations in birds.

In this experiment, you will evaluate whether or not a diet that is supplemented with "brain-enhancing" foods can help improve memory.

A project to reinforce learning about the layers of the rainforest, rain forest ecosystem, and the greenhouse effect.

Can you stain teeth with tea, coffee, or coke? Explore how in this science fair project idea.

Experiment with buoyancy to learn how a submarine rises and sinks in this classic science experiment.

Chlorine and chloramine are added to our tap water to kill harmful microorganisms. What is the best way to filter these disinfectants in your drinking water?

Using an empty tennis ball can and a swimming pool, you will determine if it's possible to have a conversation under water.

This science fair project idea creates an underwater habitat and explores the basic needs of living things under water.

In almost every preschool classroom is a sensory table. Learn how to make one at home!

Along with being an interesting science activity, dehydrated strawberries are also tasty â and healthy!

This social science experiment endeavors to determine whether certain types of animals provide greater physical and mental health benefits to their owners.

This science fair project idea focuses on saturated and unsaturated lipids (fats and oils).

Make water and clay play a little more scientific with this hands-on experiment that teaches displacement and shows how an object's shape affects its buoyancy.

Science fair project idea that examines different physical characteristics of a chosen animal. Make educated guesses about evolution based on animal's form.

The goal of this science fair experiment is to demonstrate the effects of air pressure on objects and analyze applications of air pressure principles.

This science fair project idea compares biodiversity between drops of water.

Here's a simple science activity that will help your child better understand how wells bring us water.

Check out this cool science project idea to explore the differences in feeding behaviors of birds and if other species of birds also have color preferences.

The project compares three different methods of testing turbidity in water: the secchi disk, spectrophotometer, and turbidity test kit.

Science fair project that examines the biodiversity of ant populations in various locations.

With this cool floating rocks project, your child will get some hands-on experience with buoyancy and learn why certain rocks like pumice are able to float.