Examine which metal conducts more heat by boiling water in 3 pans made of aluminum, copper, and stainless steel.

Learners hypothesize about and experiment with soil erosion in this hands-on activity.

This science fair project idea researches the different layers of the atmosphere and creates a visual representation of the atmospheric layers.

This trick uses vertical and horizontal forces to help your child to push apart your hands apart, no matter how hard you try to keep them together!

Free science fair project idea that examines the differences between cats and dogs. Analyze objective qualities rather than subjective ones.

Stir up some enthusiasm for experimentation with this candy-cracking science experiment!

This science fair project idea demonstrates that plants give off water.

Science fair project that examines how to grow bacteria in a controlled setting, using simple materials from around the home.

Observe with your third grader what happens when food starts to decompose, and boost science skills simultaneously with this experiment!

This science fair project teaches students the differences between fruits and vegetables.

This science fair project idea investigates the difference in reaction times between boys and girls.

We all know that the Moon has different phases, but it can be hard to figure out why. Try this activity to see how the Moon's phases really work.

This science fair project idea explores how the shape of a boat affects its density and how much weight it can float.

Spiders don't go to grocery stores or fast food chains to get their food -- they set up traps and wait for their food to come to them!

Check out this fun and easy 4th grade science fair project idea that tests how gravity induces positive and negative geotropism (gravitropism) in bean plants.

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

Determine whether butterflies like to drink sugar water, salt water, or plain water.

What is topography? Kids find out by learning to make and read a topographic map in this awesome science fair project idea.

This science fair project idea explores whether white light can be separated into different colors.

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.

In this project, learn about animal vision and different kinds of eyes: ocelli, compound eyes, and camera eyes. Find out what a jellyfish or grasshopper sees!

Help your child get a grasp on what it was like to build gigantic ancient structures with this easy engineering activity about science and physics.

This science fair project demonstrates the magic of arches by challenging students to stack telephone books on top of eggs without breaking them.

Give your budding young observers a chance to discover simple machines at use in their own home.

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.

Deck the halls with last season's Christmas lights for a spectacular and electrifying science activity.

Let your fourth grade chef mix up butter and sugar with scientific principles about different states of matter, and get delicious toffee, too.

This science fair project idea determines the most effective method of preserving food.

The objective of this science fair project is to examine the basic principles of air pressure using simple materials like a balloon, straw and string.

Construct and experiment with a periscope using reflected light rays to gather an image.