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While your cells are much too small to see without a microscope, you can create the look of a cell in your very own home with just an egg and vinegar!

Soil is made up of different layers. How far down do you need to dig to find the soil horizon, or the place where bits of leaves and branches become soil?

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 science project, learn about water transport in plants and make a beautiful dyed floral arrangement with cohesion, adhesion, and xylem tubes!

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!

What's the chemistry behind dyeing Easter eggs? Will adding vinegar to dye help the eggshell absorb the color? This colorful science project has the answers!

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

In this fun science fair project idea, kids will experiment with various methods in order to discover the fastest way to cool a soda.

Kids will learn how to make a steam powered rocket boat, also called a putt putt boat or a pop pop boat, in this great science fair project for 4th graders.

This light bulb science project includes step-by-step instructions for testing the heat from different light bulbs.

Determine the maximum distance traveled by projectiles launched at an angle. Use some cool math to figure out at which angle your projectile will go farthest.

This science fair project idea explores if an LED light can be powered by vegetables and/or fruits.

Check out this cool science fair project idea to explore non-chemical means of preserving fruits by using thermotherapy.

Science fair project idea that examines different physical characteristics of a chosen animal. Make educated guesses about evolution based on animal's form.

When you rub a balloon on your head, your hair stands up; but is that true for everyone? Does hair color affect static electricity?

Kids conduct a cool balloon rocket experiment in this fun science fair project idea. Does a greater volume of air mean a greater distance traveled?

In this science fair project, learn how to make gears and find out why they transmit torques in predictable ways.

Here is a cool and easy science project to determine the rate of chlorophyll breaks down and how it affects the color change of grass from green to yellow.

Explore the craters, maria, and highlands on the surface of the Moon! In this fun science project you'll create a 3-D model of the moon using paper mache.

This optics-based science fair project idea teaches kids about real and virtual images with a mind-bending candle illusion inspired by Pepper's Ghost.

Explore convex and concave objects and how they reflect light.

Find out which kind of bubble wrap fares best when put in impact.

Evaluate gender differences in processing visual information.

In this science fair project, kids observe the expansion of liquids when frozen and determine if some liquids expand more than others in the freezing process.

Ever wonder why refrigerator lights turn off when you close the door? Does the darkness prevent food from spoiling? This experiment, determines just that.

This project examines the affect of temperature on viscosity and surface tension of different liquids.

Saturn is the ringed planet in our solar system, a gas giant with rings made of ice and dust. Let's make a cool scale model with an old CD and some glitter!

This experiment has students record rat behavior to learn about the benefits of rats and research rat myths throughout history.