In this project, create and examine garden mulch to find out what critters live in the messy, muddy layers just above the soil.

Explore the role of starches as thickening agents in food, and learn about the chemical properties of starch in the process.

How to test for acids and bases? In this activity you and your child can make your own indicator from red cabbage!

This free science fair project explores the "dirty" relationship between the presence of organic material in soil and water absorbency.

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.

Science fair project that uses muriatic acid to develop fingerprints that would otherwise be invisible.

This easy aerodynamics activity is a simple way to introduce kids to the scientific method.

Study emulsifiers and learn how they are used in food science, medicine, soaps and cosmetics. Identify which materials are created using an emulsifier.

Research historic methods of food preservation. Analyze alternative recipes and techniques of food preservation. Document success with photographs.

What's a liquid? What's a solid? What better way to experiment than by turning a childhood favorite, ice cream, into a homemade science lesson!

Kids will love making sugar crystals in this sugar crystal science fair project which teaches important chemistry concepts like saturation and solubility.

Help your second grade scientist explore the timely topic of wind speed using a version of the classic Beaufort Scale.

Science fair project that examines the behavior of water and gravel in creek beds and the formation of sedimentary rocks.

Make your own marshmallows and mix up some very interesting third grade chemistry lessons while you're at it!

What can you do with hair after its cut? This science project teaches you practical uses for human hair.

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

Free science fair project idea examining how different types of water affect plant germination and growth.

This experiment will determine how different kinds of light affects the strength of bakerâs yeast.

This science fair project will help learners determine whether algae can be made to grow by feeding it supplementary carbon dioxide.

Which battery lasts the longest? In this science fair project, kids will test popular brand name batteries like Duracell and Energizer against generic brands.