How does mold grow? Kids find out by testing different conditions to measure mold growth rate and learn about what factors cause mold to grow more quickly.

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

Learn how to grow an avocado plant indoors with your 1st grader in this hands-on gardening activity.

Grow potatoes in a plastic bag—easy to grow and harvest, and yummy to eat!

Observe if dissolved aspirin will help plants grow healthier and faster in this science fair project idea.

Crystals are a very special structure. In this third grade activity, your child will learn how to grow salt crystals.

Use simple items to create a kindergarten "grow box" that lets a kid see just how salad plants send down their roots and grow underground.

Slime mold is no longer classified as fungi! So what is it? In this cool science fair project, learn how to grow slime mold and explore its behavior.

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.

Give your child a chance to experiment with how things grow. And throw in something extra to up the fun factor even more...her very own grass pet!

The objective of this experiment is to find out if cooked beans grow faster, if at all, than uncooked beans.

Grow borax crystals and get your child excited about Earth science with this crafty science experiment.

Test whether plants can grow without sunlight and water.

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.

Kids conduct a simple science experiment to see if seeds can grow without soil in this simple kindergarten science activity.

How does a compass work? What's a magnetic field? Kids will build their own compass at home to find the answers in this great science fair project idea.

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

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 does dishwashing liquid work? Kids discover the chemical mechanism behind cleansing power in this easy science fair project idea.

How does rust form? Kids will learn about the roles oxygen, water, and electrons play in rust chemistry in this cool science fair project idea.

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

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

How does bleach kill bacteria? Kids find out in this impressive bacteria science fair project by testing different concentrations on a safe strain of E. coli.

This experiment explores how microwave radiation affects fungi, bacteria, and plant life.

This science fair project idea discovers whether plants grow best in chemical fertilizer, organic fertilizer, or with no fertilizer at all.

How fast does light travel in different mediums? Kids conduct a cool refraction experiment in materials like water and air for this science fair project.

In this science fair project, students learn how pressure can make the minerals in a rock line up in the same direction and form bands and foliation.

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.

This experiment evaluates if people have an accurate perception of how much personal time they spend interacting with technology.

How does distance affect the spreading of light? Kids see diffraction and the inverse square law of light in action with this great science fair project idea.