What causes dilated pupils? Young scientists will find out by applying what they already know about changes in pupil size and making models of the pupil.

Children will learn all about cause and effect as they experiment with potion-making in this Halloween themed activity.

The purpose of this science fair project is to explore whether UV light passes through some colors and not others by looking at blue, red, purple, and clear.

Uh-oh! Is that a pill sitting on the counter or a piece of candy?

This science fair project idea measures out the sugar of various foods and find out whether people can correctly determine how much sugar is in common foods.

Start your toy engines -- this is going to be a fast and friction-filled race!

Science fair project that examines albedo, and how this information is applied in the design of cars, sportswear, and other items. Which colors reflect light?

Does the temperature of a magnet affect its strength? Learn about the relationship between magnets and temperature with this cool physics science fair project.

Is it magic? No...it's the amazing, gravity-defying capillary action experiment! Kids will love this dramatic and enlightening science fair project.

Learn about magnifying glasses, concave lenses and inverted images by sending rays of light through a magnifying glass in this cool science fair project!

Is it a square or a circle? See if you can trick your friends with this zany science project!

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.

Are you ready to be a detective for science? Then get out your magnifying glass and start studying fingerprints!

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

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.

Kids will learn how to make a thermometer to to explore liquid density in this great science fair project. Which liquids are affected by temperature the most?

This science fair project uses paper chromatography to investigate whether black, brown, orange, and purple are pure colors or mixtures of other colors.

Kids discover what a homogeneous mixture is by adding sugar to distilled water and identify the various factors affecting solubility.

In this physics project, learn about the relationship between light intensity and distance using a laser pointer, flashlight, and graph paper!

Take a dive into the candy jar with this yummy science experiment.

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.

What makes your shadow dance around all day? Let's play detective and find out why that sneaky shadow never stays in one place for long.

What's the science behind those out-of-sight roots? Find out if you can trick roots into growing in different directions.

It's not actually that hard to get energy from garbage! Kids learn how to make biogas in the form of methane with this cool and easy science fair project idea.

This science fair project idea is develops new or improved paper making techniques and encourages recycling.

Is it amplitude? Weight? Length of string? Kids will discover what factors changing the period of a pendulum depends on in this fun and easy physics experiment.

In this activity, your child will be asked to create a boat that can successfully float while holding 25 pennies.

With this cool floating rocks project, your child will get some hands-on experience with buoyancy and learn why certain rocks like pumice are able to float.

Word color association is just a fancy way to talk about the way we connect colors with words.

Learn about the layers of the Earth and make a model! Create a earth layer book, cake, or clay diagram.