This cool and easy elementary school science fair project idea provides the basic information on the use of our senses to experience the world about us.

Which sunscreen is most effective at blocking the sun's harmful UV rays? Test the SPF of various sunblock brands in this cool science project!

This kinesthetic learning activity will help your fourth grader get a firm grasp on the immensity of the solar system.

examine how passive solar heating works, measure temperature in a parked car on a sunny day. ways to use passive solar heating as an alternative, energy

A great science fair project on solar oven design that helps kids learn about solar power and solar heating.

Check out this fun science fair project idea for 1st grade: a solar eclipse model that demonstrates total, partial, and annular solar eclipses.

In this project, you will observe and record changes in sunspots over two weeks.

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

This science fair project idea recreates the movement of planetary bodies in order to learn why they sometimes appear to move backwards.

This project is a vivid, concrete introduction to the basic but important idea that plants need sunlight and water to grow.

This science fair project idea explores whether a sundial is as accurate as an atomic clock when telling time.

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.

In this science fair project, students focus sunlight with a magnifying glass and trap shorter waves to melt ice.

Recreate the fantastic phenomena of solar eclipses with your child using just a flashlight, a quarter, and her very own face!

This science fair project idea teaches about the size of two different systems: the solar system and an atomic system.

What direction should solar panels face? It's not the direction you might think! This free and enlightening science fair project helps kids discover the answer.

In this free science fair project, learn how to separate salt from water using heat. A great science project for elementary school kids.

Kids use applied math to build and test a parabolic mirror solar hot dog cooker in this cool engineering science fair project idea for middle school.

This experiment will explore how manipulating a graph of historical information might reveal new information about data.

In this free science fair project, build a star clock and learn how to tell time on a clear night by observing the big dipper!

In this fun science fair project, make two different scale models of our solar system using Astronomical Units and planets' relative size!

Science fair project that compares tree leaf size and shape based on the leaf's position in the tree. Is their is a noticeable difference between high and low?

Introduce your fourth grader to the concepts of solstices by observing the length of her shadow on the shortest day of the year, compared to other solstices.

Science fair project which measures the shadow cast by a meter stick at various times in order to predict the circumference of the earth.

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.

Learn about the greenhouse effect- and get great science fair experiment ideas. Read more.

This interdisciplinary card game will have your third grader working on math facts as he travels through the solar system!

Check out this cool and free middle school science fair project idea on how to make a solar oven.

Try this simple 2nd grade science experiment to teach your child about the principles of luminosity and light reflection.

What is a barycenter? Kids learn how gravity and mass influence the orbit of binary systems like planets and moons or stars and planets in this cool experiment.