This science fair project idea recreates the movement of planetary bodies in order to learn why they sometimes appear to move backwards.

Determine how good we are at direct and indirect observation.

This science fair project examines whether ocean water can be made safe to drink.

This science fair project idea examines which is the best way to get rid of water stains (stains caused by just water) on fabric.

This science fair project idea tests the efficacy of both synthetic and natural antibiotics.

Ethanol can be used as an alternative fuel! The purpose of this experiment is to identify a starch plant that produces the largest quantity of ethanol.

Check out this fun leaf chromatography science fair project idea for middle school students and discover the hidden pigments in leaves.

Why do ants like sugar? Do ants like artificial sweeteners too? Kids find out with this great inquiry-based science fair project.

Do dogs understand English? Kids will find out with one of our favorite dog science fair projects that tests how dogs process human language and other cues.

In this enlightening transpiration experiment, kids will explore how the loss of water from plants through transpiration contributes to the water cycle.

This science fair project idea determines exactly how much of an effect road grade has upon a cyclistâs speed.

In this wind tunnel experiment, you'll make a wind tunnel to test lift and airflow on a model plane and explore aerodynamics and the Bernoulli Principle.

This science fair project idea attempts to train a worm to complete a simple maze in order to find out if worms can learn and remember.

Science fair project that compares tree leaf size and shape based on the leaf's position in the tree. Is their is a noticeable difference between high and low?

Spiders don't go to grocery stores or fast food chains to get their food -- they set up traps and wait for their food to come to them!

What kind of fabric holds dye best? How can you improve a dyed fabric's colorfastness? In this colorful project, test colorfastness using mordants and bleach.

In this insulation experiment, you'll learn which clothes keep you warm in the cold, and which make you shiver.

This project examines the concentration of dissolved oxygen in water, with and without oil.

The objective of this science fair project it to determine whether adding ethanol alcohol to gasoline slows the run time of a motor.

Why does honey crystallize? This science fair project project answers this question and identifies the variable that makes this sweet solute crystallize faster.

This science fair project idea explores whether people have an innate feel for the passing of time from a few seconds to 20 minutes.

Is there any correlation between hot tubs and high blood pressure? Kids discover the answer (and its biological basis) in this cool science fair project.

In this Bernoulli's Principle experiment, you'll learn how an increase in the speed of a fluid, like air, decreases pressure.

Kids will learn how to show the direction of magnetic field lines and create a permanent model using iron filings in this great science fair project idea.

Easy and cool middle school science fair project on ripening process of fruits and measures you can take to prevent fruits from rotting and delay ripening.

Kids use applied math to build and test a parabolic mirror solar hot dog cooker in this cool engineering science fair project idea for middle school.

Learn how to make a hygrometer to measure relative humidity in this project. Make a sling psychrometer hygrometer with gauze, thermometers, and a bottle.

This fascinating science fair project explores eye color genotypes.

In this activity, your child will transform an egg into a glowing, bouncy "ball" that they can play with.

Science fair project that compares the relative carbon dioxide concentrations of various gases, including different types of vehicle emissions.