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.

Future engineers, unite! Discover how to keep a sandcastleâs bridge from falling into the moat.

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.

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

Discover how to make fake snot with this cool science fair project idea to learn about polymers, enzymes, and more.

The objective of this science fair project idea is to determine if sound travels best through the air, water or a solid.

What does a raindrop look like when it splashes on the ground? Is each raindrop unique like snowflakes? Find out how raindrop size varies in this experiment.

How does a flashlight work? Kids will make a complete circuit and explore how voltage contributes to brightness with this science fair project idea.

This science fair project investigates why the number of visible stars changes from place to place.

Did you even wonder why some rocks are round and smooth while others are broken up into small pieces?

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

Kids will make predictions about cricket behavior by conducting this fun and easy experiment which simulates different environments for crickets.

Create a homemade pair of sunglasses with colored lenses to see just how light and color affect our sight! Use this fun project to practice science!

The objective of this science fair project is to examine the basic principles of air pressure using simple materials like a balloon, straw and string.

Examine which metal conducts more heat by boiling water in 3 pans made of aluminum, copper, and stainless steel.

Magnets vary in strength. Have your young scientist figure out which kind of magnet is the strongest when you have him conduct this attractive experiment.

In this free science fair project, learn how to separate salt from water using heat. A great science project for elementary school kids.

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

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.

What's the chemistry behind dyeing Easter eggs? Will adding vinegar to dye help the eggshell absorb the color? This colorful science project has the answers!

This science fair project idea examines whether the colors of the spectrum respond differently in the thermal aspect when radiated by the sun.

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!

In this hands-on design challenge your child will make their very own Rube Goldberg Machine.

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

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

The purpose of this science fair project is to study the properties of sugar and examine individual preferences for sugar and other sweeteners.

Design a survival kit. Brainstorm various survival scenarios. Address basic human requirements and natural resources. Describe each tool as well uses.

This project determines whether Styrofoam, paper, or plastic cups are best for preventing ice from melting.

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