This experiment evaluates how a diet that is rich in "mood-enhancing" foods affects the way people feel over several weeks.

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

This science fair project idea identifies and understands adaptations in birds.

In this project, you will observe and record changes in sunspots over two weeks.

The purpose of this science fair project is to explore whether UV light passes through some colors and not others by looking at blue, red, purple, and clear.

Science fair project that examines the benefits of the plant enzyme: pectin methyl esterase (PME). Where is PME found in the plant? What does it do chemically?

What do ants eat? Kids find out by observing a colony of ants in this cool zoology science fair project for 4th grade.

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

Construct a model of radioactive decay. Learn more about radioactive decay by modeling the process using coin flips.

Science fair project which examines how stopping a tomato's ripening process using the enzyme ethylene effects the tomato plant and its reproduction cycle.

Develop your child's mathematical and engineering skills with this fun building brick challenge. In this activity, your learner will be challenged to create a boat out of building bricks.

Investigate the different ways in which objects and organisms can be classified, create your own. then have volunteers classify using their own systems.

Kids get step-by-step instructions for how to make a rubber band car and explore the physics of potential energy with this fun engineering science fair project.

What are the effects of fertilizer on plant growth? What's the best fertilizer type (solid, liquid or powder)? Kids find out in this science fair project idea.

Gymnosperms are coniferous trees that reproduces using pine cones to spread seeds. Check out this simple pine cone experiment to learn about the process!

What is a compound microscope? Kids find out by making one of their own in this cool science fair project.

Describe the lives of commercially raised chickens. Contact local chicken farmers for information and advice. Write a detailed report about farming techniques.

This science fair project idea explores whether mint, known for its âcooling sensationâ really does lower temperatures.

Test ability to distinguish between natural and artificial aromatherapy oils. Select fragrance, natural and synthetic sample. Volunteers state preference.

In this awesome science fair project idea, kids will be attempting to pick up different objects using snail slime.

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

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

This science fair project explores different types of endangered frogs, and why some are endangered while others are not.

Tree rings can tell the age of the tree but also information about the world. This science experiment uses tree stumps to discover new facts.

This science fair project idea assesses the effect of music on work performance.

Make a periscope with milk cartons and mirrors! This preschool activity is great for playing secret agent and learning simple physics.

Check out this cool science fair project idea to explore non-chemical means of preserving fruits by using thermotherapy.

Science fair project that determines how your mirror image differs from your actual image and how virtual images are constructed.

Check out this cool science fair project idea to explore short and long term memory and whether there is gender differences in memory.

Test for a correlation between perceived color and heart rate. Using a stethoscope and stop watch, measure the heart rate (beats per minute) of volunteers.