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

Marshmallows are made of sugar, water, and air pockets. Since the marshmallow is flexible, will air pressure cause it to expand when heated in a microwave?

This homemade barometer allows your little scientist to contemplate and compare different air and weather conditions.

This science fair project idea teaches how the gases and pollution in the air affect the earth's atmosphere temperature.

This cool science fair project teaches kids about temperature, density and buoyancy using balloons that float with normal air. No helium required!

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

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

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

Why do plants wilt? Kids will learn to think critically about what environmental factors affect plants, and what plants need to survive.

How does frost form? How fast does it form? Do this simple science project using a plastic glass, rock salt and some water to learn about deposition.

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 experiment uses a yeast solution, liquid detergent, and hydrogen peroxide to produce an exciting reaction like no other!

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!

These bean bag games are a fun and inexpensive way to keep your child learning! Work on social skills, coordination, math, or even spelling!

Do a little kitchen chemistry as you make your own bubble solution and bubble-wand shapes!

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?

How do animals keep warm? In this experiment, find out whether fat insulation resists cold temperatures and learn how this works in the animal kingdom.

This science fair project looks one of the most important factors affecting seed germination: water. A fun and easy plant biology experiment for 3rd graders.

Okay, engaging in a graphing activity may sound ho-hum, but if you use fun data, it changes the picture entirely.

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

When you rub a balloon on your head, your hair stands up; but is that true for everyone? Does hair color affect static electricity?

In this science fair project, kids measure how weather conditions affect how fast a puddle evaporates.

This activity is a fun way to "go fishing" with your preschooler, while learning about the concepts of freezing and melting.

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!

Help your kindergartener review shapes - and build early reading skills - with this creative book project.

Young physicists will wrestle with a discrepant event: the Hammer Ruler Trick. They'll make some inferences about torque, balance, and center of gravity.

Kids will learn how to make a thermometer to to explore liquid density in this great science fair project. Which liquids are affected by temperature the most?

The goal of this golf science fair science fair project is to determine whether the temperature of a golf ball affects its elasticity and its rebound.

Try this fun and simple activity to help nurture your child's observation skills and nourish a growing love of science!

Celebrate Dia de los Muertos by baking pan de muerto. In this 5th-6th grade activity, your child will explore another culture while learning about baking.