It's a rare kid who doesn't like a sandbox. Next time you're out digging, build in some earth science, too.

Have your child build a model of a coral polyp, one of the tiny animals that composes a coral reef.

In this science project idea learn about working of different types of smoke detectors and find out which one is the most effective for you.

This science fair project idea tests the efficacy of both synthetic and natural antibiotics.

Invite your kindergarten scientist to conduct this color mixing experiment to discover which primary hues make a rainbow of secondary colors.

If you find yourself with a pair of kids' rain boots too cute to toss and too worn to wear, try making this fun and easy planter.

This experiment investigates whether the primacy effect is observed more frequently in specific populations of people.

Measure the densities of various fruits and vegetables to determine if there is a relationship between density and nutritional value.

Science fair project that explains and demonstrates the parallax principle.

This science fair project examines how seeds hitchhike on animals and clothing.

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

This middle school project examines the strength of horizontal versus vertical pointing eggshells.

Use dirt and different colors of craft sand to make unique layers in a clear plastic cup to represent the layers of the Earth.

This science fair project idea researches how your choice of clothing affect how hot or cool you feel during the day.

Introduce your fourth grader to the concepts of solstices by observing the length of her shadow on the shortest day of the year, compared to other solstices.

Learn about the anatomy of the autonomic nervous system and its relationship to the rest of the body.

In this science fair experiment, children demonstrate the relationship between the amount of stuff and the amount of pressure in a closed system.

This science fair project idea determines exactly how much of an effect road grade has upon a cyclistâs speed.

Determine if certain colors of light are more effective for photosynthesis. Plant seeds in cardboard boxes with different light, record visible growth.

This science fair project idea explores whether boiling and freezing water will have an effect on how much it weighs.

This experiment investigates whether the psychological phenomenon of the halo effect can be used to explain people's perceptions of others.

This experiment will evaluate bacterial content on toothbrushes before and after different cleaning methods to determine which method of disinfecting is best.

This science fair project idea discovers the effect of (high) heat on animal cells.

This science fair project idea investigates if heat from direct sunlight is hotter than heat from reflected sunlight.