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In this classic Ivory soap experiment, kids learn what happens to different types of soap in the microwave, and why!

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.

This science fair project idea discovers whether there are some objects that do not fall at a constant rate.

This science fair project idea examines whether boys and girls differ in reflexes.

Determine which kind of rock (igneous, sedimentary, metamorphic) has the greatest reservoir capacity, which is the ability to hold the most oil and natural gas.

Do hand soaps and sanitizers prevent the growth of bread mold? If so, why? Kids will find out with this fun and informative science fair project idea.

In this science experiment, observe convection currents forming and learn about how heat energy moves in liquids from hot to cooler areas through convection.

Can a horse lead itself to the carrot? Train your horse with carrots and boxes and test horse memory in this fun zoology science fair project.

Do you think you could walk around upside down -- with your feet in the air and your head on the ground?

Teach kids about a fun way they can remember this more efficiently- the power of mnemonics. Kids will be amazed.

Take a closer look at your furry friend (or the furry friend of a neighbor -- with permission) to discover if communication exists between cats and humans.

Gather some friends for a bubbly soda taste test do determine calories' role in your favorite drinks.

Find out whether soil amendments can improve soil conditions and help you grow a bigger beanstalk in this ecology experiment!

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

Kids construct a single fixed pulley system to learn how pulleys can make work easier in this cool physics and engineering science fair project idea.

In this project, all you need is a protractor to learn how to use the altitude of Polaris to find latitude on Earth. Polaris is also known as the North Star.

Does putting soapy water on plants help or hinder plant growth? Kids learn about greywater and how it affects plant growth in this cool science fair project.

In this free science fair project, build a star clock and learn how to tell time on a clear night by observing the big dipper!

Little scientists will make inferences about hearing loss, pitch, and frequency in this great science fair idea that puts the human ear to the test.

In this science fair project, students make their own rain gauge to measure rainfall.

Experiment about connection of senses of taste and smell. Using blindfold and noseplugs, administer blind taste test. Analyze results and organize data.

This science fair project idea examines whether adding gelatin causes a solid to have a higher melting point and/or melt slower.

This science fair project idea examines how well individuals can remember a story they were told and how accurately they pass that story along.

This fun and easy middle school science fair project idea explores the topic of pollution and demonstrates if polluted soil affect the growth of green plants.

Science fair project that determines whether landscaping fabric impacts the ability of plants to receive water.

This experiment challenges students to forecast the weather based on the surrounding areas' weather.

Are you ready to be a detective for science? Then get out your magnifying glass and start studying fingerprints!

Stories change as you retell them. The objective of this science fair project is to demonstrate how information gets interpreted, distorted and changed.

Did you know a mouse eats almost fifty times as much as a cow? Find out how and test out the strange science with your friends!

Do plants get crowded? Have your curious kid investigate how plants respond if they're forced to grow together in a confined space.