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

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.

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.

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

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.

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.

Check out this cool science fair project idea to explore which other common animals besides scorpions glow under a UV Black light.