Science fair project that determines whether lettuce that is harvested gradually yields more produce than lettuce that is harvested all at once.

Using a toy race car kids create a visual model of the Doppler Effect.

In this project children practice the scientific method while playing with puffy paint.

In this science fair project, you'll make a "ghost" appear in a test tube, and learn about what happens when hot water and cold water interact.

How can we describe the relationship of magnetic field strength vs. distance? Kids will find out with this free science fair project idea.

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

In this science fair project, students use the streak test to tell minerals apart from each other.

Help your second grader observe the phases of the moon, and then let the fun loose: he'll get to chart his observations with marshmallows!

In this activity, your child will be challenged to build a tall tower out of building bricks! The instructions include questions prompts to guide students through the design challenge.

This science fair project idea explores how length affects the weight a bridge can hold.

Stories change as you retell them. The objective of this science fair project is to demonstrate how information gets interpreted, distorted and changed.

In this science fair project, students learn how pressure can make the minerals in a rock line up in the same direction and form bands and foliation.

How does water pressure change with depth? Kids learn how pressure works underwater with this cool and easy demo.

This experiment challenges students to forecast the weather based on the surrounding areas' weather.

The objective of this science fair project is to examine the effects of temperature on salt and water solutions, as they form crystals over time.

This science fair project idea determines if the size of the parachute will change the rate at which an object falls.

Is it possible to trick the forces of nature that make your bubbles round to create a square bubble?

In this science and engineering activity, children will explore types of tunnels and their purposes and then design and build a tunnel of their own.

In this free science fair project idea, we learn about surface tension and how it can support mass—in this case, a floating paper clip.

This science experiment tests why guacamole goes brown and if leaving the pit in will stop guacamole from turning brown.

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

Do you think you could walk around upside down -- with your feet in the air and your head on the ground?

This science fair project idea investigates how the shape of an object affects drag.

Science fair project that determines whether cooling eggs helps them be peeled more easily. Compare the time it took to peel each egg.

Science fair project that demonstrates the effect of detergent pollution on fresh water birds' ability to stay afloat.

Kids will learn how to show the direction of magnetic field lines and create a permanent model using iron filings in this great science fair project idea.

The project investigates how water and movement affects erosion.

It's rhyme time! With this science fair project idea, your child will find out which words can be considered easy rhyming words, and why.

Science fair project that develops latent fingerprints on a non-porous objects by converting superglue from a solid state to a gaseous state.

This project determines what category of person is most likely to be ticklish.