Assess physical and mental states of subject before and after drinking coffee. Compare initial expectations with their reported conditions.

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

What is a wedge? Kids find out by experimenting with different wedges in this simple science fair project idea.

Step into the fantastic world of colors with a project that explores what shade you -- and your friends -- like best.

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

Science fair project that demonstrates the different phases of the moon by physically representing them with construction paper and a shoebox

Free science fair project idea that measures change in flexibility with age, using a variety of flexibility tests like Sit & Reach.

Measure temperature change over time using a variety of insulation materials. Be creative with insulation materials: scarves, yarn, socks, feathers, oil, etc

Create an organic plastic product using vinegar and cream. Track decomposition over course of several weeks. Compare decomposition with traditional plastics.

Do you think you could walk around upside down -- with your feet in the air and your head on the ground?

This science project teaches students the relationship between compost and plant growth. Students conduct an experiment with different types of compost.

Examine spreadsheet functions and design a new way to utilize spreadsheets. Analyze a spreadsheet program to familiarize yourself with its capabilities.

This cool science fair project teaches kids about temperature, density and buoyancy using balloons that float with normal air. No helium required!

Learn about calorimetry, make a bomb calorimeter, and experiment with combusting different nuts to see which one produces the most energy!

Why do ants like sugar? Do ants like artificial sweeteners too? Kids find out with this great inquiry-based science fair project.

In this fun science project, learn about what happens to cut fruit and experiment with how to stop apples from turning brown.

Learn how to make a food pyramid with animals in a a coniferous forest ecosystem around your home.

Research different measurement systems, design your own new or improved system that can measure something difficult to measure with traditional systems.

Is there more air particulate matter in an urban or rural environment? Test your knowledge with this science fair project.

This simple project makes young children aware of their sense of smell and its capacity for providing them with information about their world.

Science fair project which teaches you how to make your own homemade glue by combing curdled milk with baking soda.

Explore how you can achieve magnetic levitation with the Meissner Effect! This cool science project explains formation and applications of a superconductor.

This science fair project explains the process of how the lungs expand and contract with the help of the diaphragm.

Discover how to make fake snot with this cool science fair project idea to learn about polymers, enzymes, and more.

Learn about the Atwood Machine and Newton's 2nd Law with a pulley and masses of different weights in this physics science project.

This science project lets students explore the number of spots on a ladybird and how to treat ladybugs with respect.

How can we describe the relationship of magnetic field strength vs. distance? Kids will find out with this free science fair project idea.

Kids learn how fiber optics work with a dramatic total internal reflection experiment using a fish tank, water, and a laser pointer.

Learn how starch and carbohydrates interact with different solvents in this fun and easy packing peanut science fair project.

Compare air temperature with the infrared temperature from a reflecting surface at different times of the day, in shade and in sunlight.