Can a horse lead itself to the carrot? Train your horse with carrots and boxes and test horse memory in this fun zoology science fair project.

Protozoa and ciliate and amoeba, oh my! The objective of this science fair project is for students to use a microscope and identify microscopic life.

Kids get step-by-step instructions for how to make a rubber band car and explore the physics of potential energy with this fun engineering science fair project.

In this fun science fair project idea, kids will experiment with various methods in order to discover the fastest way to cool a soda.

The objective of this science fair project idea is to examine light refraction as it passes through liquid crystals.

Future engineers, unite! Discover how to keep a sandcastleâs bridge from falling into the moat.

This light bulb science project includes step-by-step instructions for testing the heat from different light bulbs.

The goal of this science fair experiment is to demonstrate the effects of air pressure on objects and analyze applications of air pressure principles.

Science fair project that determines whether lettuce that is harvested gradually yields more produce than lettuce that is harvested all at once.

In this hands-on design challenge your child will make their very own Rube Goldberg Machine.

Science fair project that examines how to grow bacteria in a controlled setting, using simple materials from around the home.

Kids build a desert food chain, desert food web, and desert food pyramid in this cool science fair project to learn about trophic levels and consumers.

How greasy are your potato chips? Students will use a reliable method to quantify greasiness and compare different brands in this great science fair project.

Check out this cool science fair project idea to explore the risk of mechanical deterioration of artifacts placed in a storage box due to mold outbreaks.

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

Kids learn how to prevent erosion by growing grass. They'll test soil with grass against raw soil in this revealing science fair project idea for 4th grade.

This science fair project creates a visual model of whatâs happening to sound waves as a car approaches and then leaves.

What is the hydrologic cycle and how does it work? Check out this fun and easy science project where you will model and learn about Earth's water cycle!

Dive into the world of cooking oil and smoke points to discover just how fast some oils start smoking.

This easy and inexpensive paper towel science project introduces kids to important physical concepts like cohesion, adhesion, and capillarity.

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

Understanding absorption means understanding why certain fibers and materials can absorb water! Kids will see absorption in action in this simple project.

Does the temperature of a magnet affect its strength? Learn about the relationship between magnets and temperature with this cool physics science fair project.

How does water pressure change with depth? Kids learn how pressure works underwater with this cool and easy demo.

How do series and parallel circuits work, and which produces the brightest light in a light bulb? Construct both in this project and find out!

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

This science fair project idea attempts to train a worm to complete a simple maze in order to find out if worms can learn and remember.

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 fair project, students make their own rain gauge to measure rainfall.

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