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

What is mulch? Kids will provide soil with a wet blanket of mulch and see if that helps keep drought-stricken soil damp.

Do lefties just write different or are their brains different? This science project has students explore what it means to be left handed.

Get your sense of humor ready for this fun science experiment that demonstrates the fundamental physics of air pressure.

Household items and a bit of imagination will create a CSI kit for your child to have investigative adventures with. Explore the world of forensic science!

With this science fair idea, little scientists will gain valuable insights into the physics behind throwing a baseball.

This science fair project idea studies which kind of rock (sedimentary, igneous, or metamorphic) is most damaged by frozen water.

Learn whether writing things down really makes things easier to remember.

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

This science fair project idea examines which type of insulation holds in the most heat.

Create a soda bottle garden that defies gravity! This hanging terrarium is housed in a soda bottle and perfect for crafty kids with a growing green thumb.

Science fair project which teaches you how to make your own homemade glue by combing curdled milk with baking soda.

In this activity, your child will be challenged to create a device that protects an egg when it is dropped from a height of about 10 feet.

Help your child create a tasty treat that will demonstrate exactly how frogs survive a freezing season.

Kids learn how to prevent erosion by growing grass. They'll test soil with grass against raw soil in this revealing science fair project idea for 4th grade.

What cause the phases of the moon? Make a model to see how the positions of the Sun, Moon, and Earth cause the crescent, gibbous, quarter, full, and new moon.

Milk is made of water and fat; but how can you separate the two? Find out in this color changing milk experiment.

Find out whether putting something on top of a plant will inhibit its growth.

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.

This science experiment has students test whether a snail moves faster on concrete or dirt.

In this fun science fair project, make two different scale models of our solar system using Astronomical Units and planets' relative size!

What are the effects of fertilizer on plant growth? What's the best fertilizer type (solid, liquid or powder)? Kids find out in this science fair project idea.

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!

It's food. It's Thanksgiving tradition. And guess what: Cranberry Sauce is also science! Try our simple recipe/experiment.

This science fair project uses paper chromatography to investigate whether black, brown, orange, and purple are pure colors or mixtures of other colors.

Use chemical analysis to identify a variety of mystery powders that look the same but actually have very different properties.

In this Halloween-themed activity, young learners will find out what happens when they mix two household items together to create a surprising chemical reaction.

Kids build a desert food chain, desert food web, and desert food pyramid in this cool science fair project to learn about trophic levels and consumers.

This science fair project examines how tsunamis travel by simulating a tsunami moving around an island. You will generate a pretend tsunami in a swimming pool.

Teach your child about healthy foods and how to make a meal that is good for them with this fun activity that you both can do together.