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

This science project has students collect wood samples and invent new uses for different types of wood based on its properties.

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

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 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 that determines whether lettuce that is harvested gradually yields more produce than lettuce that is harvested all at once.

In this project, all you need is a protractor to learn how to use the altitude of Polaris to find latitude on Earth. Polaris is also known as the North Star.

The goal of this science fair project is to analyze differences between the taste and texture of frozen and fresh food.

This science fair project uses paper chromatography to investigate whether black, brown, orange, and purple are pure colors or mixtures of other colors.

Tree rings can tell the age of the tree but also information about the world. This science experiment uses tree stumps to discover new facts.

The objective of this science fair project is to observe the differences in heat absorption for darker colors vs. lighter colors.

Free science fair project idea that examines the differences between cats and dogs. Analyze objective qualities rather than subjective ones.

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.

The objective of this science fair project is to analyze the effects of salinity and temperature on water.

The goal of this evaporation experiment is to learn about how different external conditions affect drying time.

How greasy are your potato chips? Students will use a reliable method to quantify greasiness and compare different brands in this great science fair project.

This science fair project idea explores the egg's thin membrane.

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.

This science fair project creates a visual model of whatâs happening to sound waves as a car approaches and then leaves.

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.

Science fair project that identifies the differences between soils from different environments and attempts to figure out why those differences exist.

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

This science fair project focuses on a polymer called hydrogel super absorbent crystal which absorbs water, swelling to many times its original size.

This science fair project idea investigates how magnetism can defy the force of gravity.

This science project uses Mohsâ Hardness Test to show kids how to compare the hardness of different types of minerals.

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

This science fair project idea determines if crystals will absorb food dye and if colors will mix by the process of diffusion.

This project examines whether playing music during class helps students learn or if it distracts students from learning.