In this cool experiment, learn how to find specific gravity of minerals using liquids of different densities to see which substances and items sink and float.

The objective of this project is to evaluate whether a top will spin at different rates during different phases of the moon.

This is a quick, easy science fair project that conveys the idea of density to upper elementary students.

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

Before Twitter, birds were the ones tweeting, not humans. Have your child discover the magical sounds of nature while recording birds around his neighborhood!

The objective of this science fair project is to investigate salt water density.

The science project fair idea explores the interaction between your nose, mouth, and brain when tasting a new food or drink.

In this free science fair project idea, we learn about surface tension and how it can support mass—in this case, a floating paper clip.

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

This easy aerodynamics activity is a simple way to introduce kids to the scientific method.

Explore the relationship between personality traits and birth order effects.

In this project, several food items are tested to determine whether they contain starch.

This science fair project idea compares the mass and density of objects.

The project investigates how water and movement affects erosion.

This experiment uses Rosenberg's Self Esteem Scale to evaluate if there is a correlation between family size and self esteem.

Learn how to demagnetize a magnet and how physics can explain this phenomenon with this enlightening science fair project.

This science fair project idea examines the distance a person travels on an average day and to relate that to an understanding of the size of the Earth.

In this CD hovercraft science project, students will construct their own DIY hovercraft.

Check out this cool science fair project idea to explore the relation between onions and eyes and how to prevent eyes from tearing while cutting an onion.

This project explores differences in people's reactions to images in color and images in black and white.

The purpose of this science fair project is to build a basic radio.

Explore properties of liquids and how temperature and salinity effect surface tension of liquids in this fun- filled science fair project idea.

Blend art and science in this hands-on activity that shows your kindergartener how primary colors combine to make secondary colors.

This project determines how much the rebound rates of tennis balls change after ten games.

Check out this cool science fair project idea that models the behavior of the cold desert plants: xerophytes and halophytes.

In this science fair project, students will use methylene blue to study the presence of aerobic bacteria in milk.

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

Why do plants wilt? Kids will learn to think critically about what environmental factors affect plants, and what plants need to survive.

Sink or swim? Calculate the density of various fruits and vegetables using water and a kitchen scale.

In this science fair project, students focus sunlight with a magnifying glass and trap shorter waves to melt ice.