This project examines the concentration of dissolved oxygen in water, with and without oil.

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

This two-ingredient dough, sometimes called "moon sand," is a quick and cheap way to let kids explore their senses, build fine motor skills, and play.

Let your kid experiment with textures among fabric and other materials that are smooth, rough, soft, or slippery—and then they'll make a texture book!

Help your second grader observe the phases of the moon, and then let the fun loose: he'll get to chart his observations with marshmallows!

Science fair project that demonstrates how stalagmites and stalactites are formed.

Would it hurt to skip brushing your teeth just this once? Let's find out by seeing which foods produce the most mouth bacteria.

This science project lets students explore the number of spots on a ladybird and how to treat ladybugs with respect.

Saturn is the ringed planet in our solar system, a gas giant with rings made of ice and dust. Let's make a cool scale model with an old CD and some glitter!

Here's an easy experiment that lets your first grader practice the scientific method, while watching a caterpillar eat.

What makes your shadow dance around all day? Let's play detective and find out why that sneaky shadow never stays in one place for long.

Most people assume that cold water freezes more quickly, but could that be false? Does hot water freeze faster than cold water? Let's find out!

In this fun activity, frozen cubes of paint provide your preschooler with a cool new way to paint a masterpiece.

This conservation of energy demonstration shows why the first hill is the highest on a roller coaster. Learn more about potential and kinetic energy!

This science fair project idea creates a sedimentary rock and to investigate what takes place during the rock cycle.

Help your child explore chromatography, which is the process of separating colors or pigments, and create a neat art project in the process!

This science fair project idea investigates the ability of different whitening toothpastes to whiten teeth.

Using a toy race car kids create a visual model of the Doppler Effect.

What kind of fabric holds dye best? How can you improve a dyed fabric's colorfastness? In this colorful project, test colorfastness using mordants and bleach.

What's the relationship between temperature, air humidity and static electricity? Kids will find out with this free static electricity science fair project.

Test out various brands of permanent markers to see which one is least water soluble.

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

This science fair project idea explores whether color affects a person's emotional state.

Will your liquid weigh less once you remove the fat from it? Find out in this science fair project idea.

This science fair project idea explores alcoholic fermentation at work by making your own soda.

What causes dilated pupils? Young scientists will find out by applying what they already know about changes in pupil size and making models of the pupil.

Sure, you already know that water is made up of hydrogen and oxygen, but did you know that oxygen levels differ in different types of water?

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

Learn how to convert gravitational potential energy into mechanical energy in this fun science fair project idea.

In this science fair project, students create their own miniature salt flats at home.