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In this free science fair project, build a star clock and learn how to tell time on a clear night by observing the big dipper!

How do you tell time without a watch? Use the sun! This simple activity will show your child how to build his own sundial.

This fun science project explores the climate change over the course of the history of Earth and helps construct a diorama representing a geologic time period.

Science fair project which determines whether your current calorie intake will cause you to lose or gain weight over time.

Observe trends in the properties of writing materials over past 5000 years and extrapolate to future time. Prepare a table that compares writing material.

Salmonella and E.coli are common food contaminates. This experiment measures the time it takes for E.coli and Salmonella to reach hazardous levels in fish.

Research camouflage products and techniques, test quality by timing volunteers. Calculate the average length of time to recognize the subject.

Science fair project that determines how UV radiation emitted by the sun varies depending on the time of day, using a handheld UV detector

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

The objective of this science fair project it to determine whether adding ethanol alcohol to gasoline slows the run time of a motor.

It's rhyme time! With this science fair project idea, your child will find out which words can be considered easy rhyming words, and why.

Time to look at our faces! Are they symmetrical or asymmetrical? Find out in this science fair project idea.

Every time a sound is produced it emits a sound wave. This experiment demonstrates how sound travels, using nothing more than a spoon and a string!

This season is a great time to explore the many shapes, sizes, and species of evergreen trees. Download our "field guide" activity and learn more!

Help your kindergarten scientist predict and observe as she explores the science of smell...and have a great time doing it, too.

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

Study the effects of wind and temperature on evaporation. Place wet sponges in different environments, check at regular intervals, track time required to dry.

The objective of this science fair project is to examine the effects of temperature on salt and water solutions, as they form crystals over time.

Enjoy those warm spring and summer nights with your child while teaching some basic astronomy at the same time.

In this activity, your child will make her own "quicksand" to better understand how a substance can be both fluid and solid at the same time.

Recycling may be a confusing concept for your little one, so take the time to teach them the magic of compost - right in your own backyard!

The next time you've got a restless second grade earth scientist on your hands, use this experiment to demonstrate crystals and make a tasty treat, too!

How do crystals form? In this science fair project, students will use three different saturated solutions to see how different minerals form crystals over time.

Science fair project that determines whether cooling eggs helps them be peeled more easily. Compare the time it took to peel each egg.

With a clear bottle and a few plastic straws, you can easily make a hummingbird feeder and demonstrate the effects of atmospheric pressure at the same time!

Try this fun garden graphing project with your kindergartener this summer to give him a leg up in math and science while spending some valuable time outdoors!

Summer is a great time to work on pre-kindergarten skills that will serve your child well in her first year at school, while having some fun in the sun!

It's the day before the test, and you still have a ton to memorize! Sound familiar? Test memorizing techniques to help yourself out next time.

This fun science project helps to investigate how much water can a plant take up and release in a certain period of time through the process of transpiration.

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