Consult mechanics, automotive specialists for advice. Build a real engine or a scale model. Test and demonstrate its mechanical properties.

This science fair project teaches kids experimental design and how to test if subjects can really sense if they are being watched.

Compare the amount of ozone in various locations with this science fair project that will have your kid create her own ozone strips!

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.

Test the effects of left and right handedness on writing speed and penmanship. Volunteers hand-copy the same paragraph of text, which samples look neater?

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

Test of the effect of exercise on rote memory. Prepare a single list of 40 randomly chosen words. Have volunteers recall as many words as possible.

Science fair project that uses iodine solution to demonstrate how starch is turned into sugar when it is chewed in the mouth.

In this wind tunnel experiment, you'll make a wind tunnel to test lift and airflow on a model plane and explore aerodynamics and the Bernoulli Principle.

Study blind spots, run experiments in blind spot detection, design an original blind spot experiment, test your design on volunteers

Explore how dielectric heating comes into play when microwaving various liquids in this science project. This test will help you understand how microwaves work!

Get ready for a yummy taste test! Just pour the milk -- and make sure you have some chocolate chip cookies on hand.

Which sunscreen is most effective at blocking the sun's harmful UV rays? Test the SPF of various sunblock brands in this cool science project!

Learn how to relight a candle by lighting the vaporized wax in the smoke, and test how various kind of wax and candle brands relight differently.

Are red apples really sweeter than green apples? The objective of this science fair project is to test the theory with quantitative evidence.

Determine which factors promote the greatest memory interference. Administer test, time how long it takes subjects to complete different tasks.

In this fun science experiment, make a balloon car and test it on different surfaces to learn about sliding friction and rolling friction.

Would your dog prefer homemade or store-bought food? Raw or cooked? Test your dog's preferred diet in this fun experiment.

A science scavenger hunt can be a fun way to learn about science. Test your child's knowledge of scientific terms with this science scavenger hunt.

Which public places harbor the most bacteria and germs? Test different environments to find out where the most bacteria live in this science project.

The objective of this science fair project is to test the growth rate of a plan in a crystal medium in comparison to traditional soil.

Wool can absorb 1/3 of its weight in water, while still keeping the body warm. She can test this theory by performing a scientific sock comparison!

Bring a little science to your third grader's Christmas as you test out his sense of smell by exposing him to common Christmas scents found in your kitchen.

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.

Did you know a mouse eats almost fifty times as much as a cow? Find out how and test out the strange science with your friends!