Science fair project in which you will create your electricity by making a homemade battery using salt water, a nail, and a copper wire.

Science fair project that explores the variety of webs that spiders weave and collect specimens for identification.

Research optical illusions and human auras. Understand why the probable cause of perception is mach bands.

Do human lie detectors exist? Charge up your powers of observation to see if you can tell a lie from the truth.

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

In this science fair project, students examine how temperature affects sugar transport within a plant.

This science fair project idea focuses on saturated and unsaturated lipids (fats and oils).

Science fair project that identifies the nature of ionic and covalent bonds and determines how ionic and covalent compounds differ.

Check out this fun science fair project to make a vinegar and baking soda balloon and demonstrate how gas is created as a result of the chemical reaction.

In this science experiment, observe convection currents forming and learn about how heat energy moves in liquids from hot to cooler areas through convection.

Does 100% Fruit Juice have more Vitamin C than juice with artificial ingredients? Find out in this science fair project idea!

In this science fair project caffeine will be extracted from Gunpowder Green Tea, illustrating the isolation of a naturally occurring product from a plant.

The objective of this science project was to build a model of a volcano and observe reaction between different substances, including baking soda and vinegar.

This science project challenges students to study the salt content in tap water and learn about electrochemistry.

In this science experiment, test the pH of soil surrounding a gas station to determine if gas stations have a negative effect on the environment.

Kids explore how a single movable pulley can confer a mechanical advantage over a fixed pulley in this cool engineering science fair project for 2nd grade.

Kids love the dramatic Mentos and Diet Coke experiment conducted in this awesome science fair project.

This is a quick, easy science fair project that conveys the idea of density to upper elementary students.

Science fair project that tests the effects of diluted soap on the size of bubbles blown from the solution. Will dilution cause smaller bubbles?

This science fair project idea creates an underwater habitat and explores the basic needs of living things under water.

The buoyant force of water explains why some objects float in water. But why do some objects sink? Find out in this physics experiment and learn about density.

In this free science fair project idea, kids will conduct an easy electrolysis of water experiment to test solutions of salt, baking soda, tap water, and more.

What's the best way to make DIY compost? Kids will learn about aerobic and anaerobic decomposition while learning to appreciate the value of composting.

This science fair project idea develops an understanding through experimentation of which shapes are the most structurally strong.

Science fair project that models the subterranean movement of water, using Darcy's Law. How can this information be used in hazardous material spills?

Learn about endothermic and exothermic reactions and energy exchange by experimenting with temperature change in chemical reactions.

Explore the neural and mental mechanisms at play in mental imagery.

How do icicles form and what do they look like? Do this free science fair project and watch the formation of icicles occur right before your eyes.

This science fair project idea discovers whether plants grow best in chemical fertilizer, organic fertilizer, or with no fertilizer at all.

Science fair project that determines whether spreading a moss soup over an area increases moss growth.