This fun marbled paper craft uses things you're likely to have around your house, and it teaches kids some simple chemistry too!

This science fair project idea explores how the shape of a boat affects its density and how much weight it can float.

Let your second grader pay homage to an ancient Olympic tradition with this modern day Olympic wreath!

The objective of this science fair project is to experiment with balancing everyday objects and observing the the effects of gravity on materials.

How can we describe the relationship of magnetic field strength vs. distance? Kids will find out with this free science fair project idea.

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!

Kids will learn how to measure the viscosity of liquids by making their own homemade viscometer in this great science fair project idea.

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!

Learners hypothesize about and experiment with soil erosion in this hands-on activity.

This science fair project idea determines if crystals will absorb food dye and if colors will mix by the process of diffusion.

Discover how to make fake snot with this cool science fair project idea to learn about polymers, enzymes, and more.

How does dishwashing liquid work? Kids discover the chemical mechanism behind cleansing power in this easy science fair project idea.

Science fair project which uses coins flips to visually demonstrate the probability of an event and how to express it.

This science fair project idea determines the most effective method of preserving food.

Future engineers, unite! Discover how to keep a sandcastleâs bridge from falling into the moat.

Take a closer look at your furry friend (or the furry friend of a neighbor -- with permission) to discover if communication exists between cats and humans.

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

What is persistence of vision? With this hands-on science fair project idea, students will demonstrate this cool and dramatic phenomenon in their own classroom.

This science fair project teaches students about wilting and browning of salad greens.

Use simple items to create a kindergarten "grow box" that lets a kid see just how salad plants send down their roots and grow underground.

Have your child build his own mini waterfall, and help him develop his planning, problem solving, and architectural skills.

Try the classic balloon-on-the-wall trick with your kid and watch static electricity in action.

In this pinto bean germination experiment, you'll learn about how fertilizer aids in growing pinto beans into seedlings.

Kids learn about examples of mechanical weathering and conduct an experiment with seeds and plaster in this cool geology science fair project idea.

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

Test out the pH levels of soil in your backyard versus soil in more wild environments to solve this science case.

Learn about different fern fronds with your third grader as you create lacy, natural decorations on your Easter eggs this year.

Does your child always demand to know why the sky is blue, how the sun moves across the sky, or where wind comes from?

In this science fair project, students will create a model of a shoreline, observe erosion and examine how jetties prevent erosion.

Kids will discover the meat science behind the meat they eat, and find out how to use safe chemistry to make meat more tender.