This science fair project teaches you about what makes persimmons so tart and how astringency can be removed by studying the effect of tannins on fruit.

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!

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

Here's an activity that will get your child's attention with a back-to-school shopping spree. He'll use decimal skills to add, subtract, multiply, and divide!

This activity with add some fun and education to long car trips. Perfect for family vacations!

Science fair project that examines how yeast grows, and which conditions allow for optimal growth. What types of nutrients does yeast prefer?

Your child can turn cookie dough into a big pile of colorful painted fall leaves ready for eating!

When you're studying the Mayflower, numbers can be an important part of the history...and a great chance to practice elementary math!

Science fair project which simulates the global conveyor belts on a small scale, and observes the effects of wind, density and temperature on water movement.

Chlorine and chloramine are added to our tap water to kill harmful microorganisms. What is the best way to filter these disinfectants in your drinking water?

Have your child observe, measure and record the amount of space objects occupy, and you'll have an inside space explorer on your hands in no time!

Kids will learn how to measure the viscosity of liquids by making their own homemade viscometer in this great science fair project idea.

Using simple materials found around your home, you can reinforce the static electricity concept by helping your child build a simple device with zapping power!

Here's an interactive, fast-paced game that will make your fifth grader feel more comfortable with simple equations.

In this cool project, create a lighted, scale model of the different layers of the Sun, including the core, radiation and convection zones, and photosphere.

Is horse manure a possible energy source in a crisis? Use calorimetry to find out how much energy horse manure can produce in this science fair project.

Practice math and social studies skills with this fun game based on the Battle of Lexington and Concord.

Any time is the perfect time to whip up a delicious batch of fluffy pumpkin cookies.

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

Little scientists will make inferences about hearing loss, pitch, and frequency in this great science fair idea that puts the human ear to the test.

Science fair project that examines how temperature affects density and how density in turn affects the behavior of helium gas.

Science fair project that compares the freezing temperature of salt water and freshwater in order to learn about supercooling and condensation nuclei.

Here's a fun, geometric puzzle activity that will capture your child's interest and strengthen his number awareness and graphing skills.

What is the hydrologic cycle and how does it work? Check out this fun and easy science project where you will model and learn about Earth's water cycle!

Here's a fun at-home activity that will help your child strengthen math skills using high and low temperature data, and become a master temperature tracker!

Making metric conversions is a difficult concept to master. Get in some extra practice by playing this Tic-Tac-Toe game with your learner.

This science fair project idea explores whether mint, known for its âcooling sensationâ really does lower temperatures.

Science fair project idea which teaches you how to make butter by separating cream into butter and buttermilk.

You've heard the expression "burn rubber" but do you know how heat affects rubber? Examine the impact of temperature on rubber in this fun science experiment.

This science fair project idea explores whether boiling and freezing water will have an effect on how much it weighs.