This science fair experiment idea's objective is to understand the general concept of an acid and a base.

In this science fair project, students create their own miniature salt flats at home.

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

In this activity, your learner will be challenged to create their own tic-tac-toe grid out of building blocks.

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

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

Learn how to make a hygrometer to measure relative humidity in this project. Make a sling psychrometer hygrometer with gauze, thermometers, and a bottle.

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.

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

This basketball project explores the best way to make the perfect shot every time.

For this science fair project, kids will learn how to make a lemon battery. They can conduct this classic experiment using readily available materials.

Science fair project which teaches you how to make your own homemade glue by combing curdled milk with baking soda.

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

Could there be toxic chemicals lurking in the cupboards and closets of your home?

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.

It's not actually that hard to get energy from garbage! Kids learn how to make biogas in the form of methane with this cool and easy science fair project idea.

Kids will learn how to make a steam powered rocket boat, also called a putt putt boat or a pop pop boat, in this great science fair project for 4th graders.

This science fair project idea creates cool new colorful fabric pattern designs and experiments with the mixing of colors.

Can you plant the insect-attracting borage plant to increase the amount of beneficial insects in your garden? Find out in this experiment!

This science fair project idea explores how the shape of a boat affects its density and how much weight it can float.

The project determines determine if a sports drink affects the heart rate of a student athlete during exercise.

In this activity your child will create their very own marble maze!

Observe how your brain works while it is focused on one thing, and how it works while you are distracted by another thing.

This science fair project idea explores alcoholic fermentation at work by making your own soda.

Challenge your learner to design and build a city of their own in this creative engineering activity.

This study evaluates if electronic devices commonly found in most households emit radiation, and if they do, how much?

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.

This science fair project idea determines if family members can recognize one another using only the sense of smell.

In this fun activity, your child will create their very own solar oven to bake s'mores!