Competitors go head-to-head only this time it's a race to figure out the lowest common multiple of two numbers; an important step to working with fractions!

In this fun science fair project idea learn about universal solvents and solutes and find out the solubility of several common liquid substances.

Science fair project in which you will attempt to throw a ball the greatest horizontal distance possible by using different angles.

Determine which kind of rock (igneous, sedimentary, metamorphic) has the greatest reservoir capacity, which is the ability to hold the most oil and natural gas.

Kids will conduct a cool limewater carbon dioxide test that can be performed with common household materials to learn about the chemistry of this common gas.

Does your child know all the greatest kid-friendly places in town? Here's an activity that lets them create a cool city guide and work their writing chops, too!

Study the life cycle of the common blowfly as it relates to forensic investigation. Record the first time you see flies, maggots, and eggs.

Believe it or not, the common spud has enough electrochemical energy to power a small digital clock.

Here's a hands-on way to help your child understand how common fractions can be equivalent.

This science fair project idea explores whether factors such as temperature and concentration affect the pH of a solution.

Turn the common pastime of constructing paper airplanes into a lesson on the physics of aerodynamics and flight with this fun science activity.

Here's a review of some common (and commonly confused) grammar terms, as well as a quick activity to apply them to reading and writing.

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

In this activity, learners will discover how to make a basic water filtration system using common materials found around the house or outside.

Make environmentally friendly, chemical-free toothpaste using one of the most common, inexpensive pantry staples in the American kitchen: baking soda.

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 next time you and your fifth grader go on a hike, take along this key to figure out which common North American animal left a track along the river bank.

One thing the Christmas season is known for making is yummy treats! Cookies, pies, fudges, and cakes are common desserts during Christmas time. If you want to choose a healthier option this holiday season, create a Christmas tree with fruit. It will be a

Wondering how to help your child get a handle on prime numbers? Turn her into a prime number hunter with this hundreds chart activity.

There are many benefits to bugs and insects. This science project shows how cockroaches, termites, and other critters benefit our planet.

This science experiment tests if dog saliva can really help heal wounds.

Greek mythology offers up some of the most epic tales ever. This Greek mythology tree activity introduces students to some of the main characters in Greek mythology.

Kids will love making sugar crystals in this sugar crystal science fair project which teaches important chemistry concepts like saturation and solubility.

This science project allows students to study the psychology of happiness.

Free science fair project idea that examines the differences between cats and dogs. Analyze objective qualities rather than subjective ones.

In this fun project, use a memory game to test various age groups and determine whether aging directly affects short-term memory loss.

Find out which type of sponge holds the most water.

This science research project challenges students to think of more effective lobster farming methods.

Science fair project that uses muriatic acid to develop fingerprints that would otherwise be invisible.

Science fair project in which you will start a fire from scratch without using matches or a lighter.