Learn how to make a hygrometer to measure relative humidity in this project. Make a sling psychrometer hygrometer with gauze, thermometers, and a bottle.

Find the North Star, and measure your latitude! The purpose of this science fair project is to find latitude and learn about geographic locations.

Is there a relationship between caffeine and heart rate? Students will determine the effect of caffeine on heart rate in this fun science fair project.

This science fair project idea develops an understanding through experimentation of which shapes are the most structurally strong.

The objective of this science fair project is to examine the effects of temperature on salt and water solutions, as they form crystals over time.

This science project teaches students the relationship between compost and plant growth. Students conduct an experiment with different types of compost.

Learn about this simple machine and make a pulley of your own to use for fun science trials.

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!

This science fair project idea compares biodiversity between drops of water.

This science fair project idea investigates if webbed feet help a duck (and others) swim.

Is it magic? No...it's the amazing, gravity-defying capillary action experiment! Kids will love this dramatic and enlightening science fair project.

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

This cool and easy elementary school science fair project idea provides the basic information on the use of our senses to experience the world about us.

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

Kids build a desert food chain, desert food web, and desert food pyramid in this cool science fair project to learn about trophic levels and consumers.

In this open-ended activity, students will be given a small quantity of three types of materials and asked to design a prototype for “something that will improve the school.”

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

Milk is made of water and fat; but how can you separate the two? Find out in this color changing milk experiment.

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

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.

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

Stories change as you retell them. The objective of this science fair project is to demonstrate how information gets interpreted, distorted and changed.

Science fair project that teaches you about chemical indicators and how to make your own in order to identify various mystery solutions.

This science fair project idea produces varying pitches of sound.

Saturn is the ringed planet in our solar system, a gas giant with rings made of ice and dust. Let's make a cool scale model with an old CD and some glitter!

In this fun project, use a memory game to test various age groups and determine whether aging directly affects short-term memory loss.

Use chemical analysis to identify a variety of mystery powders that look the same but actually have very different properties.

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