In this experiment, students find out what happens when a less-dense fluid interacts with a denser one, replicating the effect of cooler solid rock on magma.

In this simple science project, learn about what causes dew and what affects dew formation with a drinking glass, ice, and a soda bottle.

What do ants eat? Kids find out by observing a colony of ants in this cool zoology science fair project for 4th grade.

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.

What is elasticity? Students will investigate how this concept applies to bouncing ball physics by testing the bounces of balls made out of different materials.

What causes the seasons to change? Kids find out by modeling the earth's tilt using a globe, flashlight and graph paper in this cool science fair project idea.

Amaze your kids by separating a salt and pepper mixture using an "electric spoon" charged with wool.

In this fun science project, learn about what happens to cut fruit and experiment with how to stop apples from turning brown.

What animals are most popular? This project affords practice in data-collection, record-keeping and data-analysis through the investigation of this question.

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.

In this science fair projects, students will grow out the bacteria that collect on air conditioner filters.

Magnets vary in strength. Have your young scientist figure out which kind of magnet is the strongest when you have him conduct this attractive experiment.

Examine whether distilled water, spring water, or regular tap water yield faster plant growth.

On the next chilly, winter day, invite your fifth grader to make a hand warmer by experimenting with the loaded combination of a few natural ingredients.

Will potatoes spud or sprout faster in dry, dark, or cold conditions? Find out in this science fair project idea!

What are buttress roots? In this fun science project, make a model of a rainforest tree and learn how they help trees survive in the tropical rainforest!

This science fair project creates a visual model of whatâs happening to sound waves as a car approaches and then leaves.

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

This project examines whether people's taste perception is influenced by what they see.

In this science fair project, students examine under what conditions individual plants release seeds and how far the seeds are released.

This science fair project idea determines what household items are good conductors of electricity.

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

This science fair project idea determines what household items are good conductors of electricity.

How well can people recall what they have observed. Test your knowledge in this fun experiment.

How do organic materials become soil? This science experiment measures what materials biodegrade.

This taste buds science experiment demonstrates how strongly our sense of smell controls what we taste.

What is it about a Slinky that causes it to walk down the steps? This simple experiment is a perfect illustration of both gravity and momentum.

What is the best stain remover for clothes? In this fun and easy science fair project idea, students will identify the best method for laundry stain removal.

This science fair project idea creates a sedimentary rock and to investigate what takes place during the rock cycle.

What's the relationship between temperature, air humidity and static electricity? Kids will find out with this free static electricity science fair project.