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.

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

Grow a garden with an environmentally-friendly twist by using plant scraps that usually get thrown away.

This science fair project idea determines the probability of a coin landing heads or tails.

In this 3rd grade science activity, you'll experiment with the little-known fourth state of matter: polymers! Mix borax with white glue and watch what happens.

Little scientists will make inferences about hearing loss, pitch, and frequency in this great science fair idea that puts the human ear to the test.

This homemade barometer allows your little scientist to contemplate and compare different air and weather conditions.

Help your child celebrate the summer and the sun by making a sandy seascape.

Do you think heat can affect a plant's growth rate?

Science fair project that examines the different types of precipitation, evaluates the density of snow and calculates the ratio of snow-to-liquid.

In this science experiment, your child will test the strength of hollow structures in order to understand how strong bird bones really are.

Help your curious third grader construct a dazzling spinning wheel that will teach him about the science behind colors while providing some silly entertainment!

Learn about the role of Earth's rotation on the Coriolis Effect and hurricanes in this science project. Model the Coriolis Effect on a hurricane's direction.

Take advantage of the fact that ink and water don't mix and introduce your kid to suminagashi, a Japanese form of art.

Is your child a young ornithologist in the making?

This science project teaches young students about germs, bacteria, and the importance of washing their hands. Students will test what is the best way to wash.

Recreate the fantastic phenomena of solar eclipses with your child using just a flashlight, a quarter, and her very own face!

Find out whether packaged seeds actually do expire in this new science fair project idea.

When you see those sunscreen "protection levels," what does that really mean? Try this experiment to find out.

Chlorine and chloramine are added to our tap water to kill harmful microorganisms. What is the best way to filter these disinfectants in your drinking water?

Using a toy race car kids create a visual model of the Doppler Effect.

Make all-natural dye from vegetables to create gorgeous homemade play-silks!

Show your child that the simplest ingredients (salt and water) can be used to illustrate the concept of density!

This science fair project idea explores whether the process used to dry the beans we eat for food renders them unviable.

This science fair project idea produces varying pitches of sound.

Observe corn seed germination to learn about dicots and monocots and how plants grow from seeds to seedlings to full-grown plants!

This project examines whether playing music during class helps students learn or if it distracts students from learning.

This science fair project idea explores whether people have an innate feel for the passing of time from a few seconds to 20 minutes.

This project explores whether plants can live and grow when "watered" with juice, soda, or milk.

Kids will create their own version of Richard Feynman's rubber band heat engine to learn about thermodynamics with this cool science fair project idea.