This project determines the age of a tree using a growth factor chart instead of cutting the tree down to count the rings in its base.

Do plants get crowded? Have your curious kid investigate how plants respond if they're forced to grow together in a confined space.

Science fair project that demonstrates the effect of detergent pollution on fresh water birds' ability to stay afloat.

Learn about this simple machine and make a pulley of your own to use for fun science trials.

Learn how to make a hygrometer to measure relative humidity in this project. Make a sling psychrometer hygrometer with gauze, thermometers, and a bottle.

If your mom likes flowers, make her a sweet gift that she'll treasure with this fun craft, a pretty Pressed Flowers Card!

Is there a relationship between caffeine and heart rate? Students will determine the effect of caffeine on heart rate in this fun science fair project.

This science project allows students to study the psychology of happiness.

This science fair project idea compares biodiversity between drops of water.

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 science project encourages students to investigate the Mozart Effect, the idea that classical music promotes learning.

Science fair project that teaches you about chemical indicators and how to make your own in order to identify various mystery solutions.

In this cool physics experiment, use double plane mirrors at various angles to learn about light reflection. Then, see if you can solve a puzzling problem!

This science fair project idea explores whether a plastic slinky works as well as a metal slinky when walking it down the stairs.

In this design challenge, your child will make a bottle rocket using typical household items.

Take a look at forensic science with your child. She'll learn how to take a shoe impression, just like the detectives do!

The objective of this science fair project is to analyze the effects of salinity and temperature on water.

How do the phases of the Moon and gravity cause spring tides and neap tides? Does the Sun play a role in the tides? Figure it out in this fun science project!

This science fair project idea investigates how color affects temperature.

Science fair project which measures the shadow cast by a meter stick at various times in order to predict the circumference of the earth.

This project explores ways to prevent static electrical shocks.

The purpose of this science fair project is to study the properties of sugar and examine individual preferences for sugar and other sweeteners.

This science fair project idea investigates the hardness property of minerals.

Learn about the layers of the Earth and make a model! Create a earth layer book, cake, or clay diagram.

Try this simple 2nd grade science experiment to teach your child about the principles of luminosity and light reflection.

Is it magic? No...it's the amazing, gravity-defying capillary action experiment! Kids will love this dramatic and enlightening science fair project.