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

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 determines if the temperature of rubber effects how high it bounces.

Glass is see-through, but usually you can still see that it is there. In this experiment, we use baby oil to make glass go completely invisible.

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

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

This science fair project idea investigates how color affects temperature.

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

This science fair project idea explores whether cats can be trained in the same way that dogs can.

Little scientists will make inferences about hearing loss, pitch, and frequency in this great science fair idea that puts the human ear to the test.

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.

Science fair project idea which teaches you how to make butter by separating cream into butter and buttermilk.

This project examines whether people's taste perception is influenced by what they see.

Science fair project that uses muriatic acid to develop fingerprints that would otherwise be invisible.

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

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

What are the effects of colored light on plant growth? Explore plant behavior in this cool botany science fair project and learn about phototropism!

Do lefties just write different or are their brains different? This science project has students explore what it means to be left handed.

Find out which kind of bubble wrap fares best when put in impact.

In this cool physics experiment, use double plane mirrors at various angles to learn about light reflection. Then, see if you can solve a puzzling problem!

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

Learn about the power of exponents. The objective of this science fair project is to explore and understand how exponents are used.

This science fair project idea investigates if heat from direct sunlight is hotter than heat from reflected sunlight.

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

This science fair project idea attempts to train a worm to complete a simple maze in order to find out if worms can learn and remember.

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

Science fair project which teaches you how to make your own homemade glue by combing curdled milk with baking soda.

Kids get step-by-step instructions for how to make a rubber band car and explore the physics of potential energy with this fun engineering science fair project.

This science fair project idea explores whether a plastic slinky works as well as a metal slinky when walking it down the stairs.

Discover whether a metal will expand under hot water.