In this science fair project, apply the principles of leverage and force by building six simple machines designed to set weights in motion.

In this experiment, students find out what happens when a less-dense fluid interacts with a denser one, replicating the effect of cooler solid rock on magma.

Find out whether a longer airplane will fly farther or a wider paper airplane.

Observe how your brain works while it is focused on one thing, and how it works while you are distracted by another thing.

Watch pre-packaged seeds and seeds taken from inside fruits and vegetables grow. Which ones will grow faster? Read more in this science fair project idea.

Science fair project which tests various sedimentary, igneous and metamorphic rocks to find out whether one rock family is stronger than the others.

The goal of this science fair project is to discover the science behind carbonated soft drinks and apply this knowledge to create a new one.

What do ants eat? Kids find out by observing a colony of ants in this cool zoology science fair project for 4th grade.

Learn how to make an anemometer with step-by-step instructions in this cool science fair project idea for 4th grade.

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.

Kids explore how a single movable pulley can confer a mechanical advantage over a fixed pulley in this cool engineering science fair project for 2nd grade.

Check out this fun and easy 4th grade science fair project idea that tests how gravity induces positive and negative geotropism (gravitropism) in bean plants.

Find out whether packaged seeds actually do expire in this new science fair project idea.

This science fair project idea determines if the color of light affects the growth of plants.

How do organic materials become soil? This science experiment measures what materials biodegrade.

Free science fair project idea that examines the differences between cats and dogs. Analyze objective qualities rather than subjective ones.

Science fair project that examines how to grow bacteria in a controlled setting, using simple materials from around the home.

In this project students experiment with making music using only glasses of water.

Examine whether distilled water, spring water, or regular tap water yield faster plant growth.

This science fair project idea investigates whether plants can survive being frozen.

This science project encourages students to investigate the Mozart Effect, the idea that classical music promotes learning.

This science fair project teaches kids experimental design and how to test if subjects can really sense if they are being watched.

In this outdoor science activity you'll find tips on how to create a nature journal by choosing a native plant or animal and tracking that species.

This science fair project idea determines the most effective method of preserving food.

Determine whether butterflies like to drink sugar water, salt water, or plain water.

Science fair project which determines whether the size or the thickness of a piece of paper has an effect on how many times it can be folded in half.

In this popcorn experiment, students can explore how two things made out of the same material can have very different appearances and densities.

Ever wondered how a plant drinks water? This science project will teach you how and help you create a beautiful floral display!

This science fair project idea examines whether adding gelatin causes a solid to have a higher melting point and/or melt slower.

In this science fair project, students will create a model of a shoreline, observe erosion and examine how jetties prevent erosion.