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.

Here's a great activity that uses corks and toothpicks to create a fleet of floating boats. Which design makes for the most seaworthy vessel?

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

This science fair project idea explores alcoholic fermentation at work by making your own soda.

Learn whether dark green and leafy veggies tend to have a higher Vitamin C content than lighter green varieties.

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

This science fair project idea investigates how color affects temperature.

This science fair project idea determines the most effective method of preserving food.

In this outdoor science activity you'll find tips on how to create a nature journal by choosing a native plant or animal and tracking that species.

This science fair project idea models industrial oil spills and determines if they have an impact on wildlife living beneath the surface of the water.

Is garlic antibacterial? Antimicrobial? Kids find out by using common kitchen equipment and ingredients in this cool and easy microbiology science fair project.

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

Total alkalinity and pH personal care products are controlled to prevent skin irritation. Learn more about basic and acidic substances in this science project.