This science fair project idea investigates how a bottom keel helps keep a boat from rocking back and forth.

This science fair project idea investigates how the height at which a pendulum is released affects the length of time it continues.

Science fair project in which you will start a fire from scratch without using matches or a lighter.

This is a fun and inexpensive project and it's a great way for your child to build basic geometry skills, like shape recognition and pattern/angle familiarity.

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

In this cool engineering science fair project, kids learn how to build Hero's engine: an enlightening example of Newton's third law.

Is it amplitude? Weight? Length of string? Kids will discover what factors changing the period of a pendulum depends on in this fun and easy physics experiment.

This science fair project enhances the understanding and awareness of energy use and explores the concept of energy efficient.

Throughout history, people have used song as a teaching and memory tool. This project explores whether song improves a person's ability to retain information.

Help your second grader observe the phases of the moon, and then let the fun loose: he'll get to chart his observations with marshmallows!

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!

What is elasticity? Students will investigate how this concept applies to bouncing ball physics by testing the bounces of balls made out of different materials.

What is condensation? Little mad scientists will learn about condensation, states of matter, and air pressure by conducting this cool science experiment.

What is a compound microscope? Kids find out by making one of their own in this cool science fair project.

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?

Learn how different types of soil affect how animal tracks form in this experiment!

Do you think heat can affect a plant's growth rate?

In this fun guessing game, your child uses his sense of smell and taste to figure out what is in the container. Here's how to play:

By incorporating natural materials and the powers of observation, your child will become a backyard naturalist while building early writing and drawing skills!

The project determines the forces that cause paper airplanes to fly and determine which type of paper airplane flies the farthest.

Do you think you could walk around upside down -- with your feet in the air and your head on the ground?

Kids will learn how to make a steam powered rocket boat, also called a putt putt boat or a pop pop boat, in this great science fair project for 4th graders.

In this project, create and examine garden mulch to find out what critters live in the messy, muddy layers just above the soil.

While your cells are much too small to see without a microscope, you can create the look of a cell in your very own home with just an egg and vinegar!

This science fair project idea researches the effects of acid rain on plant growth.

The goal of this science fair project is to demonstrate different ways to generate static electricity and record its effects.

The goal of this project is to create an exciting topographical map out of dough.

Want to see a great example of Newton's first law? Kids will learn about basic physics with this fun, ballistic experiment.

The objective of this science fair project is to explore the relationship between acidic and basic compounds.