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.

Kids learn how to prevent erosion by growing grass. They'll test soil with grass against raw soil in this revealing science fair project idea for 4th grade.

Science isn't ho hum anymore when it involves building catapults to teach your fifth grader about projectile motion.

Glass is see-through, but usually you can still see that it is there. In this experiment, we use baby oil to make glass go completely invisible.

In this project students experiment with making music using only glasses of water.

This science fair project idea studies which brand of wintergreen candy produces the most sparks in the dark.

You've heard all about oil spills, but can they really be that bad? After all, vegetable oil is in almost every yummy baking good from cookies to brownies.

This science fair project idea compares biodiversity between drops of water.

This basketball project explores the best way to make the perfect shot every time.

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

This science fair project examines how tsunamis travel by simulating a tsunami moving around an island. You will generate a pretend tsunami in a swimming pool.

This science fair project idea develops an understanding through experimentation of which shapes are the most structurally strong.

Learn how to make a weathervane with this fun and simple meteorology project for fourth graders.

Find out whether cast iron or regular teflon pans heat up faster and also retain their heat longer.

Science fair project about work and energy which uses a simple mathematical formula to predict how far a jar will roll down an incline.

Here's a fun activity that will introduce your fourth grader to the concept of frictionless motion by constructing a hovercraft.

Teach your fifth grader about the wonders of wind by making and observing this winter wind chime.

This project demonstrates the correspondence between the volume of water displaced by a submerged object and the volume of the object displacing it.

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

Find out which type of sponge holds the most water.

Find out whether a longer airplane will fly farther or a wider paper airplane.

This kinesthetic learning activity will help your fourth grader get a firm grasp on the immensity of the solar system.

Using an empty tennis ball can and a swimming pool, you will determine if it's possible to have a conversation under water.

Invite your fifth grader to test the different rates of liquid absorption in synthetic and cotton materials, such as nylon and cotton.

Every time a sound is produced it emits a sound wave. This experiment demonstrates how sound travels, using nothing more than a spoon and a string!

What happens when colored beams of light mix? You might be surprised.

This science fair project idea explores if the length of the string that an object is suspended on has an effect on how fast or slow it swings.

Demonstrate how static electricity can cause an object to move. It also examines just how an object affected by static electricity will move.

Introduce your fourth grader to the concepts of solstices by observing the length of her shadow on the shortest day of the year, compared to other solstices.

If your fourth grader is obsessed with all things glow-in-the-dark, then here's an activity that will really light up her imagination!