How does rust form? Kids will learn about the roles oxygen, water, and electrons play in rust chemistry in this cool science fair project idea.

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!

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.

In this fun science fair project idea learn about universal solvents and solutes and find out the solubility of several common liquid substances.

It's not actually that hard to get energy from garbage! Kids learn how to make biogas in the form of methane with this cool and easy science fair project idea.

Kids will learn how to make a steam powered rocket boat, also called a putt putt boat or a pop pop boat, in this great science fair project for 4th graders.

4th graders construct an ocean food web to learn about consumers and trophic levels, food webs, and food chains in this cool ecology science fair project.

In this experiment, young ecologists will learn about a type of edge effect: how trees and plants at the edge of a forest can act as a weed filter.

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.

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.

Check out this cool science project idea to learn about rocks and explore the cycles of formation, breakdown, and reformation of rocks in the Earth's crust.

What is elasticity? Students will investigate how this concept applies to bouncing ball physics by testing the bounces of balls made out of different materials.

What chromosome combinations determine a fetus gender? Use probability to think about whether a sperm and ovum will create a male or female in this project.

Science fair project that determines whether cooling eggs helps them be peeled more easily. Compare the time it took to peel each egg.

Do you love to make Jell-O? Find out in this science fair project idea if it is possible to make Jell-O with just warm water.

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

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

This science fair project idea examines whether adding gelatin causes a solid to have a higher melting point and/or melt slower.

In this science fair project, students will try to discover if test subjects can detect the presence of Monosodium Glutumate (MSG) in food.

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.

This science fair project idea examines whether boys and girls differ in reflexes.

The goal of this project is to create an exciting topographical map out of dough.

This science fair project idea explores the different properties & interactions of sugar molecules.

Science fair project that determines whether tapping a pomegranate with a spoon helps it release its seeds.

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

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

Throughout history, people have used song as a teaching and memory tool. This project explores whether song improves a person's ability to retain information.

Science fair project that determines whether landscaping fabric impacts the ability of plants to receive water.

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

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