Learn about this simple machine and make a pulley of your own to use for fun science trials.

In this science fair project, apply the principles of leverage and force by building six simple machines designed to set weights in motion.

Science fair project that determines whether mass and weight are the same or different.

The project examines absorbent polymers absorbency in disposable diapers and their unique ecological problem to the environment.

In this cool physics experiment, use double plane mirrors at various angles to learn about light reflection. Then, see if you can solve a puzzling problem!

In this windmill model science project, you will build a windmill to learn about wheel-and-axle machines and how these simple machines are used to do work.

Did you know your body is full of simple machines? This project looks at one of the third-class levers in the human body: your arm!

How would you dry your wet clothes if your dryer didn't work? Find out with this fun experiment!

Design a survival kit. Brainstorm various survival scenarios. Address basic human requirements and natural resources. Describe each tool as well uses.

This science experiment examines the role of fat in food, especially in making bread rise and whipping cream.

The project determines which laundry detergent is best for cleaning clothes.

This science project teaches students about organic farming and the benefits and disadvantages of commercial plant food.

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

Kids get step-by-step instructions for how to make a rubber band car and explore the physics of potential energy with this fun engineering science fair project.

The purpose of this science fair project is to explore whether UV light passes through some colors and not others by looking at blue, red, purple, and clear.

This science fair project idea experiments with spinning color wheels and optical illusions.

Discover which fabrics shrink the most in the wash and why.

Is it amplitude? Weight? Length of string? Kids will discover what factors changing the period of a pendulum depends on in this fun and easy physics experiment.

Kids will create their own version of Richard Feynman's rubber band heat engine to learn about thermodynamics with this cool science fair project idea.

These science fair experiments demonstrate the chemistry of rust and the oxidation process.

This project explores ways to prevent static electrical shocks.

This science fair project looks one of the most important factors affecting seed germination: water. A fun and easy plant biology experiment for 3rd graders.

Certain fruits can change gelatinâs ability to set. In this experiment, kids will discover what happens when gelatin meets pineapple enzyme.

In this project, a model of a submarine is built to simulate the buoyancy and displacement of water and air.

Would it hurt to skip brushing your teeth just this once? Let's find out by seeing which foods produce the most mouth bacteria.

When you cut a flower to put into a vase, it'll eventually wilt, even with water and sunshine. But is there another scientific secret to keeping flowers fresh?

How does salinity affect the point at which water freezes? Kids will find out by performing this cool melting ice experiment.

Gymnosperms are coniferous trees that reproduces using pine cones to spread seeds. Check out this simple pine cone experiment to learn about the process!

Science fair project which measures whether tsunamis are more destructive when they are caused by an earthquake or by a meteor.

This fun experiment provides a concrete and visually striking illustration of photosynthesis.