In this science fair project, kids measure how weather conditions affect how fast a puddle evaporates.

Learn how to demagnetize a magnet and how physics can explain this phenomenon with this enlightening science fair project.

Kids often ask, "how tall am I?" This science fair project seeks to determine how well kids can guess their own heights.

Learn how to make a periscope with this cool engineering science fair project idea, and learn about optics to learn how a periscope works.

How do crystals form? In this science fair project, students will use three different saturated solutions to see how different minerals form crystals over time.

How does frost form? How fast does it form? Do this simple science project using a plastic glass, rock salt and some water to learn about deposition.

This science fair project examines how seeds hitchhike on animals and clothing.

Ever wondered how a plant drinks water? This science project will teach you how and help you create a beautiful floral display!

This science fair project idea investigates how different disinfectants work in killing germs.

How does a kazoo, the strings of a guitar, or the speaker of a radio make sound? The purpose of this science fair project is to show how vibration makes sound.

In this science fair project, learn how to make gears and find out why they transmit torques in predictable ways.

This science fair project idea explores how water and ice can change the form of rocks.

This science fair project idea measures out the sugar of various foods and find out whether people can correctly determine how much sugar is in common foods.

A math project teaches students to use a clinometer to gauge the height of very tall objects like trees & to think of better ways to measure how high they are.

How does smell affect taste? Ready your taste buds--in this project, you'll gather some test subjects and do a taste test to see how much smell affects taste.

This science fair project idea shows kids how to grow mold and whether mold grows better in dry or moist conditions.

Science fair project that examines the relationship between the size of a bubble and how quickly it falls. What is the correlation?

Learn how to make an anemometer with step-by-step instructions in this cool science fair project idea for 4th grade.

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 science fair project idea explores how far the average human can see.

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.

Create safe lightning for kids! They'll learn how to make lightning at home with this fun science fair project idea illustrating static charges and grounding.

Demonstrate how you can make your own compass using a magnetized needle. It also allows you to compare magnetic north and geographic north.

In this experiment you observe and determine how well your cat uses his whiskers to navigate through a maze.

This experiment will determine how different kinds of light affects the strength of bakerâs yeast.

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

Kids will learn how to make a thermometer to to explore liquid density in this great science fair project. Which liquids are affected by temperature the most?

Kids learn how to make a simple electric motor in this great engineering science fair project that teaches them how current generates its own magnetic field.

Learn how milk freezes into ice cream. Does the fat content affect how quickly the milk freezes? What is salt's role in the freezing process?

How do icicles form and what do they look like? Do this free science fair project and watch the formation of icicles occur right before your eyes.