Learn how to tell time by the sun with this cool science fair project idea that tracks how the accuracy of a sundial changes over time.

How does a compass work? What's a magnetic field? Kids will build their own compass at home to find the answers in this great science fair project idea.

How does dishwashing liquid work? Kids discover the chemical mechanism behind cleansing power in this easy science fair project idea.

How does a flashlight work? Kids will make a complete circuit and explore how voltage contributes to brightness with this science fair project idea.

In this science fair project, we'll explore how blocking the sun's light can stop those can stop photosensitive paper from changing color.

This science fair project idea explores how enzyme inhibitors, active sites, non-competitive enzyme inhibitors, and substrates work.

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

This project leads to an understanding that a whole may be built of smaller parts that fit and work together and provides an introduction to basic tools.

Kids construct a single fixed pulley system to learn how pulleys can make work easier in this cool physics and engineering science fair project idea.

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

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

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

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

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!

This experiment challenges students to forecast the weather based on the surrounding areas' weather.

Why do plants wilt? Kids will learn to think critically about what environmental factors affect plants, and what plants need to survive.

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.

In this science project, young children observe, record, and create collections of colors in their world and increase their powers of observation.

This project examines whether people's taste perception is influenced by what they see.

In this science fair project, young children observe, record, and create collections of shapes in their world and increase their powers of observation.

This fun experiment provides a concrete and visually striking illustration of photosynthesis.

This science fair project idea teaches how the gases and pollution in the air affect the earth's atmosphere temperature.

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?

Kids will build a turtle habitat in order to observe the climate preferences of this cold-blooded reptile.

The moon doesn't produce its own light, so why can we see it shining in the sky? Learn about reflection and planetshine in this fun and easy science project!

Do earthworms like moisture or darkness? Find out as we explore the relationship between earthworms and light.

Science fair project that examines what causes thunder and why a thunderclap sounds so loud. How is lightening related to the creation of sound waves?

Plants and light seem to be good buddies, but how far does the friendship really go?

This science fair project idea teaches that time always passes at the same rate and nothing we do in our daily life âreallyâ affects how fast it moves.