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Determine which video game elevates the heart rate best and burns the most calories.

This science fair project idea investigates if webbed feet help a duck (and others) swim.

Make a periscope with milk cartons and mirrors! This preschool activity is great for playing secret agent and learning simple physics.

This science fair project idea will be examining oxidation and acid rain

This science fair project idea quantifies the effect of weather- in this case temperature and humidity- on musical instruments.

Is exercise a cellular activity? Check out this fun science fair project idea to compare the carbon dioxide production before and after exercise.

Study how we perceive color by exploring optical illusions such as pointillism, digital images, and Ishihara tests.

Help your middle schooler improve his observation skills by playing this simple observation and spatial memorization game.

In this fun science fair project idea learn the difference between additive and subtractive color and why they are handled differently.

This science fair project idea investigates how a bottom keel helps keep a boat from rocking back and forth.

What happens when eyes see something that the brain knows cannot be true? In this science activity, the brain has to "fudge" it when interpreting what you see.

Compare the whitening abilities of four different brands of whitening toothpaste to see which one whitens the fastest and which one whitens the most.

Kids will learn some cool stuff about chemical reactions by determining what happens when you mix different concentrations of hydrogen peroxide and yeast.

Kids explore how a single movable pulley can confer a mechanical advantage over a fixed pulley in this cool engineering science fair project for 2nd grade.

The thermometer outside is dip, dip, dipping! What kind of clothes will keep you warmest this winter? This project determines which materials insulate best.

In this challenge, students are tasked with creating a model roller coaster that a marble can travel through.

Science fair project that determines which materials cause the most friction by sliding blocks of wood down a ramp.

Kids make strong bubbles to investigate the effect different additives have on bubble life in this cool science fair project idea.

Science far project which determines whether the material of a baseball bat affects the distance that the baseball will travel.

The purpose of this science fair project is to learn which substance best preserves apples. Learn about enzyme interactions in fruit and scientific processes.

Science fair project that determines whether wireless networks damage living plants. Are WiFi radiation hazardous to your health?

The goal of this project is to create an exciting topographical map out of dough.

This science fair project examines the different composition of fungi and plants.

This science fair project demonstrates the magic of arches by challenging students to stack telephone books on top of eggs without breaking them.

Inspire your child to put on her engineer hat for the day, as she builds her very own, double-decker bridge.

This science fair project idea examines various dead zones and investigates the cause and how it can be fixed.

Is the birthday paradox really a paradox, or just an intriguing problem that defies intuition? Find out with this birthday paradox science fair project.

This science fair project idea provides evidence that air is everywhere and takes up space.

Kids discover what a homogeneous mixture is by adding sugar to distilled water and identify the various factors affecting solubility.

How does a flashlight work? Kids will make a complete circuit and explore how voltage contributes to brightness with this science fair project idea.