Is it amplitude? Weight? Length of string? Kids will discover what factors changing the period of a pendulum depends on in this fun and easy physics experiment.

Do dogs understand English? Kids will find out with one of our favorite dog science fair projects that tests how dogs process human language and other cues.

Learn about the horizontal and vertical motion of a projectile in this cool physics science fair project idea for advanced middle and high school students.

Spiders don't go to grocery stores or fast food chains to get their food -- they set up traps and wait for their food to come to them!

Students pit the heat capacity of water against the heat capacity of oil while looking at the effects of dipole rotation in this cool science fair project idea.

Examine whether distilled water, spring water, or regular tap water yield faster plant growth.

Science fair project that compares the properties of different fabrics to determine whether natural or synthetic fabrics are better at wicking away moisture.

Compare animal and plant fats and observe, and record, and draw conclusions about their similarities and differences.

Make meringues with your first grader and see how states of matter can transform before your very eyes. Here's how:

Science fair project that determines the correlation between the ability of selected materials to conduct heat and a material's density.

This science fair project idea determines whether the hand a person writes with relates to which side they will choose from in a fake taste test.

Determine whether people can actually taste the difference between âhealthyâ cookies and the traditional version.

The goal of this evaporation experiment is to learn about how different external conditions affect drying time.

The next time you and your fifth grader go on a hike, take along this key to figure out which common North American animal left a track along the river bank.

This science fair project idea tests the effect of heat- at varying temperatures- on the viability of biological enzymes.

Children will learn why and how to compost as they help with the process of filling their compost, turning it, and observing the changes that occur.

This science fair project idea determines which flower lasts the longest.

Find out if most people can distinguish the difference between tones on different instruments.

Give your science savvy kindergarten a lesson in plant science with this fun carnation experiment.

How does light affect plant growth? Do different colors of light work better than others? Find out in this classic science fair project idea.

In this science fair project, students evaluate if astrological signs provide clues about people's personalities.

The project investigates how water and movement affects erosion.

This science fair project idea studies whether a religious sleeping schedule relates to a higher IQ.

This science fair project idea explores whether white light can be separated into different colors.

Discover if temperature settings in a fridge make a drastic difference in terms of bacterial growth.

This science fair project idea investigates which objects float and sink in honey, water, and oil.

Does fear cause the same physiologic responses in men and women? This experiment measures people's blood pressure and heart rate while watching a scary movie.

2011 VIRTUAL SCIENCE FAIR ENTRY: The objective of this science fair project is to develop a microcontroller and circuit that can conduct electricity.