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

What is mulch? Kids will provide soil with a wet blanket of mulch and see if that helps keep drought-stricken soil damp.

Using scherenschnitte, your science-savvy second grader will be able to create and display each part of a vegetable!

Discover whether a metal will expand under hot water.

In this project, build an insect model that shows how the head, thorax, and abdomen fit together! Learn insect anatomy by constructing a paper mache critter.

Kids conduct a cool balloon rocket experiment in this fun science fair project idea. Does a greater volume of air mean a greater distance traveled?

The objective of this science fair project is to explore the relationship between acidic and basic compounds.

When you rub a balloon on your head, your hair stands up; but is that true for everyone? Does hair color affect static electricity?

It's easy to plant your own in-home container garden! This planter contains pizza-themed herbs and is a perfect early gardening activity for kindergarteners.

This science project encourages students to investigate the Mozart Effect, the idea that classical music promotes learning.

This science fair project demonstrates the magic of arches by challenging students to stack telephone books on top of eggs without breaking them.

Your kid can learn about the process of making frozen yogurt and enjoy a homemade, flavorful dessert. Experiment with this fun, chilly food!

Learn how to make marbleized paper with simple everyday ingredients in this fun activity! Your child will learn about oil and water while doing this project.

In this activity, you'll send your kindergartener on a scavenger hunt to find sounds and create a sound recording. Here's how!

Air invisible; it doesn't make sounds; you can't pick it up and throw it. So how do we know it exists? Help your second grade scientist figure it out.

This experiment explores whether reading text on a computer screen or type on paper leads to better retention of the information read.

Your third grader will delight in learning about sound waves as he observes the different sounds created by tapping on glasses with varying amounts of water.

This activity works well with a group or just with a parent and child, and it can make a great party game since it's both fun and inexpensive.

This science fair project teaches about mold. Students will test different foods to see which grow mold the fastest.

Does your middle school teenager have good reflexes? Gauge his reaction time in this science and math activity that requires only a yardstick and a friend.

The next time you've got a restless second grade earth scientist on your hands, use this experiment to demonstrate crystals and make a tasty treat, too!

Give your local birds a treat — and your young birdwatcher some fun — with this simple DIY bird feeder.

In this fun experiment, learn about brand awareness and the influence of media on children by testing logo recognition in different age groups.

What's the science behind those out-of-sight roots? Find out if you can trick roots into growing in different directions.

What is biodiversity? Kids will study different areas of their backyards to see which is the most diverse to learn about biodiversity and random sampling.

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.

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

Learn about the layers of the Earth and make a model! Create a earth layer book, cake, or clay diagram.

The goal of this science fair project is to discover the science behind carbonated soft drinks and apply this knowledge to create a new one.