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.

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.

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.

Examine the effect of pressure on carbonation in soda.

Science fair project idea examines validity of mood ring predictions. Analyze accuracy of results, consider the impact of temperature

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.

This science fair project idea examines whether plants are still able to grow normally if they are turned upside-down.

This science project teaches students to classify different shapes of leaves.

To help your child learn how to use a thermometer, try this temperature collecting activity at home.

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

This science fair project idea investigates how color affects temperature.

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

In this experiment you observe and determine how well your cat uses his whiskers to navigate through a maze.

How does distance affect the spreading of light? Kids see diffraction and the inverse square law of light in action with this great science fair project idea.

Looking for a fun summer adventure? Learn what it was like to be a prospector during the California Gold Rush by panning for gold in a local creek.

Discover whether cold or hot water from the faucet will boil faster on the stove.

This science fair project idea produces sounds by creating vibrations using different objects.

This science fair project idea investigates how optical distances change the apparent size of an object as seen through a magnifying lens.

Make some easy homemade yogurt with your young scientist, and see what a few 'live' bacteria can do in the right conditions!