What are buttress roots? In this fun science project, make a model of a rainforest tree and learn how they help trees survive in the tropical rainforest!

In this enlightening transpiration experiment, kids will explore how the loss of water from plants through transpiration contributes to the water cycle.

In this CD hovercraft science project, students will construct their own DIY hovercraft.

In this science fair project, we'll use a liquid crystal thermometer to find out whether exercising makes a difference in people's temperature.

Science fair project that develops latent fingerprints on a non-porous objects by converting superglue from a solid state to a gaseous state.

This experiment has students record rat behavior to learn about the benefits of rats and research rat myths throughout history.

In this plastic wrap science fair project, you'll learn about polymer permeability and find out which plastic wrap keeps food from dehydrating best.

What is topography? Kids find out by learning to make and read a topographic map in this awesome science fair project idea.

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

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.

What causes the seasons to change? Kids find out by modeling the earth's tilt using a globe, flashlight and graph paper in this cool science fair project idea.

How do icicles form and what do they look like? Do this free science fair project and watch the formation of icicles occur right before your eyes.

This science project challenges students to study deer behavior in their natural habitat- the feeding patterns, social behaviors, male to female ratio, etc.

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

In this science project, learn about water transport in plants and make a beautiful dyed floral arrangement with cohesion, adhesion, and xylem tubes!

In this fun science fair project idea, kids will experiment with various methods in order to discover the fastest way to cool a soda.

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

Challenge your learner to design and build a city of their own in this creative engineering activity.

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

Discover whether cold or hot water from the faucet will boil faster on the stove.

What is persistence of vision? With this hands-on science fair project idea, students will demonstrate this cool and dramatic phenomenon in their own classroom.

The purpose of this science fair project is to determine which conditions and materials quicken the composting process to make the best compost.

Understanding absorption means understanding why certain fibers and materials can absorb water! Kids will see absorption in action in this simple project.

This science fair project examines how seeds hitchhike on animals and clothing.

Discover whether different amounts of water added into a wine glass will produce a different pitch when their fingers are rubbed along the rim.

This project compares the strength of one, two, and three-ply toilet paper.

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

Kids will conduct a cool limewater carbon dioxide test that can be performed with common household materials to learn about the chemistry of this common gas.

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.

Did you know your body is full of simple machines? This project looks at one of the third-class levers in the human body: your arm!