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

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.

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!

This science fair project idea identifies clouds as a means of predicting the weather.

This science fair project idea deals with the qualities of shade on a sunny day.

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.

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 simple experiment serves as an introduction to the greenhouse effect.

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.

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

The project investigates the affect music has on plant growth while experimenting with rock, classical and no music.

Based on the concept of water's "freezing point," this activity entails the lowering of water's freezing point to chill ice cream!

The crust is fun for kids to mix and roll out, and the filling overflows with vitamin and anti-oxidant packed berries!

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.

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

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

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

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

Kids will learn about insulation, heat conduction, and the economic benefits of energy efficient windows in this cool science fair project.

This science fair project idea researches how your choice of clothing affect how hot or cool you feel during the day.

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

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

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

Make this delectable custard, meringue, and graham cracker pie will give your fifth grader practice with measurement and get him interested in the kitchen.

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!

Check out this cool science fair project idea to explore the risk of mechanical deterioration of artifacts placed in a storage box due to mold outbreaks.

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!

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.

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