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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.

This project demonstrates the correspondence between the volume of water displaced by a submerged object and the volume of the object displacing it.

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

Do you have your isopods straight? Learn about sow bug and pill bug behavior by building a terrarium to study them in!

In this classic Ivory soap experiment, kids learn what happens to different types of soap in the microwave, and why!

Discover whether a metal will expand under hot water.

This science experiment has students test whether a snail moves faster on concrete or dirt.

This science project has students study a group of volunteer liars actively lying to study the behavior of a lie. Students see if they can figure out the truth.

Take a closer look at your furry friend (or the furry friend of a neighbor -- with permission) to discover if communication exists between cats and humans.

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

In this science fair project, kids will be able to see where germs reside on their hands while gaining insight into the benefits of thorough hand washing.

This science project challenges students to study deer behavior in their natural habitat- the feeding patterns, social behaviors, male to female ratio, etc.

In this cool science fair project idea, kids conduct the ruler drop test on volunteers to determine whether reaction time can be improved with practice.

With this science fair idea, little scientists will gain valuable insights into the physics behind throwing a baseball.

Test whether plants can grow without sunlight and water.

This science fair project idea provides evidence that air is everywhere and takes up space.

These science fair experiments demonstrate the chemistry of rust and the oxidation process.

This engaging project encourages young children to practice and refine the important scientific skills of sorting and classification.

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

Kids will create their own version of Richard Feynman's rubber band heat engine to learn about thermodynamics with this cool science fair project idea.

In this cool physics experiment, use double plane mirrors at various angles to learn about light reflection. Then, see if you can solve a puzzling problem!

Science fair project in which you will learn more about the natural world by preserving and identifying different animal tracks.

This project compares the strength of one, two, and three-ply toilet paper.

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

Did you even wonder why some rocks are round and smooth while others are broken up into small pieces?

This science experiment tests whether warm or cold water works best in making cut flowers last longer.

Science fair project in which you will start a fire from scratch without using matches or a lighter.

Experiment about connection of senses of taste and smell. Using blindfold and noseplugs, administer blind taste test. Analyze results and organize data.

This simple heat transfer experiment is a great introduction to the concepts of heat transfer and conduction.

The objective of this science project is to determine the length of time for different seeds to germinate.