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

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

Learn to recognize symmetry by playing this game! The more you play, the better you'll get at recognizing this special characteristic many playing cards have.

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

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

To help your child learn how to use a thermometer, try this temperature collecting activity at home.

Try this entertaining and educational math activity that will teach your child how to add and subtract decimals.

Teach your fifth grader an important math concept with this quick and simple activity that shows them how to divide whole numbers by fractions.

In this science fair project, we learn how air molecules move as a result of density, convection, and air currents.

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

How much does 100 weigh? Play this fun guessing game with your child to commemorate the 100th day of school.

For a fun activity that takes the dull out of decimals, show you child how to gain a better understanding of decimals...as dollar amounts!

This decimal game is a great way to help your child get familiar with how decimal values work.

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

Dive into the world of cooking oil and smoke points to discover just how fast some oils start smoking.

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

In this science experiment, observe convection currents forming and learn about how heat energy moves in liquids from hot to cooler areas through convection.

Check out this game that provides an enjoyable way of demonstrating how recorded results can be expressed in whole numbers, fractions, and decimals.

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.

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.

Science fair project in which you will examine how crystals are formed by creating your own crystal using charcoal briquettes, salt, and ammonia.

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!

Whatever is stacked in your cupboard can be used to help your child learn how to compare fractions and decimals. A great hands-on math lesson!

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.

This fun science project helps to investigate how much water can a plant take up and release in a certain period of time through the process of transpiration.

Introduce your fourth or fifth grader to volume by having him build rectangular prisms, and then count each sugar cube to check his volume calculations.

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

Increase your child's confidence in interpreting bar graphs and throw a little candy into the mix to sweeten the learning process.

This hands-on activity gives your child an opportunity to apply various strategies to solve a problem and to check if his answer makes sense.

This fun activity encourages your child to develop their skills in not only taking measurements, but also in working with the measurements themselves.