In this project children discover, identify, and sort seeds from a variety of fruits and vegetables

Find out whether matte or shiny nail polish lasts longer.

In this insulation experiment, you'll learn which clothes keep you warm in the cold, and which make you shiver.

In this free science fair project idea, we learn about surface tension and how it can support mass—in this case, a floating paper clip.

What is the hydrologic cycle and how does it work? Check out this fun and easy science project where you will model and learn about Earth's water cycle!

Science fair project that examines how temperature affects density and how density in turn affects the behavior of helium gas.

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

Find out whether putting something on top of a plant will inhibit its growth.

With this science fair idea, little scientists will gain valuable insights into the physics behind throwing a baseball.

The goal of this science fair experiment is to demonstrate the effects of air pressure on objects and analyze applications of air pressure principles.

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

Is it possible to trick the forces of nature that make your bubbles round to create a square bubble?

In this science fair project, students focus sunlight with a magnifying glass and trap shorter waves to melt ice.

What do worms eat? Kids find out what kinds of rotting leaves and vegetables worms prefer in this cool compost science fair project.

Find out whether soil amendments can improve soil conditions and help you grow a bigger beanstalk in this ecology experiment!

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

Discover whether a metal will expand under hot water.

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

Kids learn how to prevent erosion by growing grass. They'll test soil with grass against raw soil in this revealing science fair project idea for 4th grade.

This science fair project on testing water hardness is a great introduction to practical chemistry. Test and learn the difference between hard and soft water.

Prove that the Earth is not flat. The objective of this science fair project is to measure the angle of the sun and calculate the circumference of the Earth.

What animals are most popular? This project affords practice in data-collection, record-keeping and data-analysis through the investigation of this question.

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

Science fair project about work and energy which uses a simple mathematical formula to predict how far a jar will roll down an incline.

Kids make a paperclip perform an act of magnetic levitation and test how effective various materials are at magnetic shielding in this science fair project.

In this science fair project you will make a model of a cell membrane using very simple material.

This science fair idea project identifies the active ingredients in soap and experiments with the properties of soap.

This science fair project idea investigates the hardness property of minerals.

This science fair project idea examines which type of insulation holds in the most heat.

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