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

This simple experiment serves as an introduction to the greenhouse effect.

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?

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

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

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

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.

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.

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.

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.

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

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

This Pysanky egg-decorating activity is perfect for young artists. Bring a little color and creativity to any holiday with this traditional Ukrainian craft.

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

This Mother's Day, mix in some fifth grade science learning to create this fabulous fudge!

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 create their own version of Richard Feynman's rubber band heat engine to learn about thermodynamics with this cool science fair project idea.

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

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.

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.

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

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

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

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!

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.

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

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.

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