Kids learn how to manipulate additive and subtractive colors to send secret messages with red colored filters in this cool science fair project idea.

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 science experiment, observe convection currents forming and learn about how heat energy moves in liquids from hot to cooler areas through convection.

Learn about the effect of artificial light on plant growth versus natural sunlight and delve into some biology and botany concepts in this science project.

This science fair project idea examines whether the colors of the spectrum respond differently in the thermal aspect when radiated by the sun.

In this project, all you need is a protractor to learn how to use the altitude of Polaris to find latitude on Earth. Polaris is also known as the North Star.

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.

This year on Mother's Day, try this gift project that brings together an appreciation for gardening with a hands-on lesson in art history.

What are the effects of colored light on plant growth? Explore plant behavior in this cool botany science fair project and learn about phototropism!

Here is a cool and easy science project to determine the rate of chlorophyll breaks down and how it affects the color change of grass from green to yellow.

Make a spring collage with your child to get them outside and those creative juices flowing!

In this fun experiment, we'll find out how color affects heat absorption!

This 4th of July, explore fourth grade science and make some safe fireworks in your own backyard using soda pop!

Stir up some enthusiasm for experimentation with this candy-cracking science experiment!

Stories change as you retell them. The objective of this science fair project is to demonstrate how information gets interpreted, distorted and changed.

Teach your child some scientific basics as you explore the densities of various liquids in this fun experiment.

This science fair project idea determines if crystals will absorb food dye and if colors will mix by the process of diffusion.

What happens when colored beams of light mix? You might be surprised.

Science fair project that teaches you about chemical indicators and how to make your own in order to identify various mystery solutions.

Conduct a simple science experiment to see if flowers from your garden pass the acid-base indicator test with this exciting chemistry activity.

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

Turn an abstract lesson into a practical craft with the fun and colorful creation of dough earth layers!

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.

Encourage local wildlife to settle down in your backyard with this adorable bird nest craft.

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

Find the North Star, and measure your latitude! The purpose of this science fair project is to find latitude and learn about geographic locations.

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

This experiment has students record rat behavior to learn about the benefits of rats and research rat myths throughout history.

Learners hypothesize about and experiment with soil erosion in this hands-on activity.

The objective of this science fair project is to analyze the effects of salinity and temperature on water.