Show your child that the simplest ingredients (salt and water) can be used to illustrate the concept of density!

What do ants eat? Kids find out by observing a colony of ants in this cool zoology science fair project for 4th grade.

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!

Do you love to make Jell-O? Find out in this science fair project idea if it is possible to make Jell-O with just warm water.

What keeps a an item cooler, polymer crystals or ice? Find out in this cool science experiment!

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

This science fair project idea examines which type of insulation holds in the most heat.

How do organic materials become soil? This science experiment measures what materials biodegrade.

This science fair project idea explores the different properties of matter.

This project examines whether people's taste perception is influenced by what they see.

Would your dog prefer homemade or store-bought food? Raw or cooked? Test your dog's preferred diet in this fun experiment.

This experiment has students record rat behavior to learn about the benefits of rats and research rat myths throughout history.

This science project challenges students to learn about and classify weeds and discover new practical uses for weeds.

Help your child understand the scientific concept of evaporation with this fun outdoor science activity.

Check out this cool science fair project idea to explore which other common animals besides scorpions glow under a UV Black light.

This science project has students collect wood samples and invent new uses for different types of wood based on its properties.

This science project teaches young students about germs, bacteria, and the importance of washing their hands. Students will test what is the best way to wash.

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.

Have you ever noticed the ridges on a dog's nose? In this project, we take several dogs' nose prints and discover just how unique they are!

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.

The purpose of this study is to determine if people can tell the difference between organic and conventional food from looking at, smelling and tasting it.

In this project students experiment with making music using only glasses of water.

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.

Try this simple 2nd grade science experiment to teach your child about the principles of luminosity and light reflection.

Your fourth grader will be astonished to discover the significance and intricacies of his spine as he builds a model of a human vertebral column.

Making your own glass cleaner is easy, effective and inexpensive!

Did you know your body is full of simple machines? This project looks at one of the third-class levers in the human body: your arm!

Kids explore how a single movable pulley can confer a mechanical advantage over a fixed pulley in this cool engineering science fair project for 2nd grade.

Before Twitter, birds were the ones tweeting, not humans. Have your child discover the magical sounds of nature while recording birds around his neighborhood!

In this project, learn about animal vision and different kinds of eyes: ocelli, compound eyes, and camera eyes. Find out what a jellyfish or grasshopper sees!