This science fair experiment idea's objective is to understand the general concept of an acid and a base.

In this activity, your child will be challenged to create a device that protects an egg when it is dropped from a height of about 10 feet.

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

Science fair project idea that examines different physical characteristics of a chosen animal. Make educated guesses about evolution based on animal's form.

This science fair project idea explores the relationship between oil and water in terms of density as well as hydrophilic/hydrophobic compounds.

This science project idea examines the effect of microwaving on various objects.

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

In this science fair project, kids start a chemical reaction that will make a balloon inflate itself!

Your fourth grader will be astonished to discover the significance and intricacies of his spine as he builds a model of a human vertebral column.

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

Your child helps the environment while saving your family money in this fun and rewarding "Gas Guzzlers" competition.

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

This science fair project idea investigates the difference in reaction times between boys and girls.

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

An home science experiment for older students that teaches about the science behind heat.

This science fair project idea investigates if fats add to the flavor of food.

Want to make Halloween truly eerie? Science to the rescue! These ghouly hands come alive with a little help from simple chemistry.

Discover whether different amounts of water added into a wine glass will produce a different pitch when their fingers are rubbed along the rim.

In this fun science fair project, make two different scale models of our solar system using Astronomical Units and planets' relative size!

This science fair project teaches kids experimental design and how to test if subjects can really sense if they are being watched.

This science fair project idea explores substances that cause a bubble to last longer.

In this science fair project, students will create a model of a shoreline, observe erosion and examine how jetties prevent erosion.

Kids will learn about the interaction of lactose and lactase in milk and discover why we describe enzymes as catalysts in this fun science fair project.

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!

How do organic materials become soil? This science experiment measures what materials biodegrade.

This science fair project idea examines liquids of different densities.

This science fair project idea determines if the color of light affects the growth of plants.

Science fair project idea examines validity of mood ring predictions. Analyze accuracy of results, consider the impact of temperature

Learn how to make a weathervane with this fun and simple meteorology project for fourth graders.

In this experiment you observe and determine how well your cat uses his whiskers to navigate through a maze.