This project examines who can jump higher, boys or girls, younger people or older, and how these two factors, gender and age, interact with one another.

Create a colorful, informative display that illustrates the properties of blood cells. Prepare slides using samples of fresh raw beef or chicken bone marrow.

In this science fair experiment, middle school students evaluate whether tone of voice can influence our ability to remember a list of everyday objects.

The objective of this science fair project is to observe the differences in heat absorption for darker colors vs. lighter colors.

In this science fair project, students investigate how different colors influence appetite.

Discover whether eating certain foods will make you smell (not only bad breath) but through skin cells.

Describe the lives of commercially raised chickens. Contact local chicken farmers for information and advice. Write a detailed report about farming techniques.

Get a cool science fair project idea for middle schoolers on the effect of adding sugar to the growth of green plants.

The purpose of this science project is to investigate which will grow larger plants: compost, soil and Miracle - Gro, a mixture of both.

What is persistence of vision? With this hands-on science fair project idea, students will demonstrate this cool and dramatic phenomenon in their own classroom.

This science fair project focuses on a polymer called hydrogel super absorbent crystal which absorbs water, swelling to many times its original size.

In this experiment, students will discover how heat and pressure turn clay into slate, phyllite, and finally schist.

In this free science fair project idea, kids will conduct an easy electrolysis of water experiment to test solutions of salt, baking soda, tap water, and more.

Would your dog prefer homemade or store-bought food? Raw or cooked? Test your dog's preferred diet in this fun experiment.

In this fun experiment, learn about brand awareness and the influence of media on children by testing logo recognition in different age groups.

Calculate the mass of the Earth using the sidereal and calendar period of the Moon and Newton's Law of Universal Gravitation in this physics science project!

Learn how to use the Punnett Square to predict the gene combinations of dominant and recessive traits in this fun and easy genetics science project!

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

This science fair project idea determines effective strategies to help students stay awake and attentive.

Discover the interactions of synthetic dyes and natural dyes on natural and artificially-made fabrics.

Kids love the dramatic Mentos and Diet Coke experiment conducted in this awesome science fair project.

Free science fair project idea that examines the differences between cats and dogs. Analyze objective qualities rather than subjective ones.

Determine which seeds are most likely to survive harsh winter conditions (low temperatures).

The objective of this science fair project idea is to explore which brands of "anti-fade" shampoos work the best to keep hair color looking fresh.

Determine the differences between various bicep exercises, both in terms of how much muscle exertion they create and how they affect your heart rate.

Will increasing the amount of salt in water effect how slow or fast the water freezes?

Check out this free high school science fair project to explore the physics of the Coriolis effect with a homemade Foucault Pendulum.

This project examines which style of central-air system filter traps the most particles from the air.

This experiment examines if space objects become round after reaching a certain mass.

This experiment demonstrates the conservation and transfer of energy using a marble rolling over sandpaper.