Use a microscope in this experiment to learn about different kinds of "good bacteria" that turn milk into yogurt!

Help your second grade scientist explore the timely topic of wind speed using a version of the classic Beaufort Scale.

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

This science fair project determines if the allelopathic chemical produced by the black walnut tree biodegrades immediately or persists over several days.

Want to get your bookworm interested in science? Check out this cool activity that teaches kids how to write science fiction!

This project investigates several commercially decaffeinated tea types (black, green, oolong, white) for the presence of detectable traces of caffeine.

Show your fourth grader how to see her heart in action. Make a simple device out of a drinking straw and clay to help her spot the movement of her pulse!

Learn how to convert gravitational potential energy into mechanical energy in this fun science fair project idea.

Examine whether distilled water, spring water, or regular tap water yield faster plant growth.

Create a double-slit interference out of cardboard. Produce an interference pattern that demonstrates the wave and particle characteristics of light.

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

What chromosome combinations determine a fetus gender? Use probability to think about whether a sperm and ovum will create a male or female in this project.

How would you dry your wet clothes if your dryer didn't work? Find out with this fun experiment!

This science fair project idea discovers if an artificial light source will yield the same plant health and growth rates as light from the sun.

This science fair project compares the allelopathic chemical produced by the Black Walnut tree to a commercial herbicide in stopping the growth of a shrub.

In this fun design challenge, your child will get creative with making structures out of toothpicks and gumdrop candies.

The objective of this science fair project is to assess the benefits of the game system for improving player performance following use.

This balloon-powered car project is a great way for your kid to learn about energy and how it can be used efficiently.

Science fair project that teaches you key definitions of molecular science, and how different isotopes of an element affect the relative atomic mass.

How can we describe the relationship of magnetic field strength vs. distance? Kids will find out with this free science fair project idea.

This science fair project idea determines what household items are good conductors of electricity.

Science fair project examining barometric pressure, and how it can be used to predict the weather. How does atmospheric pressures relate to weather conditions?

Children will learn why and how to compost as they help with the process of filling their compost, turning it, and observing the changes that occur.

The objective of this science fair project is to set up a compost bin to convert food scraps and organic waste.

What heats up fasterâwater or soil? 5th grade students test the specific heat of water against the specific heat of sand in this great science fair project.

Check out this fun science project idea to get a better understanding of unstable isotopes and the process of radioactive decay of isotopes through modeling.