This project determines the age of a tree using a growth factor chart instead of cutting the tree down to count the rings in its base.

Do dogs understand English? Kids will find out with one of our favorite dog science fair projects that tests how dogs process human language and other cues.

In this experiment we will be determining whether birds prefer certain colors of seed.

This science fair project idea identifies trees using a dichotomous key.

This project examines the phenomenon of using a mirror to trick a person's brain into experiencing sensations in body parts not actually affected.

This project explores the interaction between air pressure and playing surface in determining a basketballâs bounce.

This cool air pressure demonstration has kids break a ruler using only a newspaper and atmospheric pressure.

Looking for a project on machines? Get a fun elementary school science fair project idea to design a compound machine using your knowledge of simple machines.

Discover whether the â5-second ruleâ is effective at determining whether food is still safe to eat after being dropped on the ground.

The goal of this science fair project is to identify the galactic center of the milky way using globular clusters, as found through Google Earth.

Can you increase the light and plant growth in your garden using mirrors? In this experiment, measure light reflection and find out!

Kids will learn some cool stuff about chemical reactions by determining what happens when you mix different concentrations of hydrogen peroxide and yeast.

In this science fair project, students will learn how to calculate the formula for the thermal decomposition of potassium chlorate.

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 investigates whether smell can be used to enhance test subjects' memories.

Bake some cookies with an oven that collects sunlight and traps the shorter wavelengths (heat!).

Learn how to relight a candle by lighting the vaporized wax in the smoke, and test how various kind of wax and candle brands relight differently.

Check out this cool science fair idea on why hard fruits become soft and learn how to compare the sugar content between ripe and unripe fruits.

This fun science fair project idea explains what a circadian rhythm is and explores the types of biological activities that follow a 24 hour cycle in mammals.

Explore how you can achieve magnetic levitation with the Meissner Effect! This cool science project explains formation and applications of a superconductor.

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

Students identify variables that affect the duration of high school romances and analyze data to predict the success or failure of ongoing relationships.

This science fair project idea designs safe bicycle routes using GPS.

Check out this fun science fair project to make a vinegar and baking soda balloon and demonstrate how gas is created as a result of the chemical reaction.

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

The objective of this science fair project idea is to examine light refraction as it passes through liquid crystals.

Construct and experiment with a periscope using reflected light rays to gather an image.

This experiment demonstrates the conservation and transfer of energy using a marble rolling over sandpaper.

This science fair project idea produces sounds by creating vibrations using different objects.

Construct a model of radioactive decay. Learn more about radioactive decay by modeling the process using coin flips.