What cause the phases of the moon? Make a model to see how the positions of the Sun, Moon, and Earth cause the crescent, gibbous, quarter, full, and new moon.

In this cool engineering science fair project, kids learn how to build Hero's engine: an enlightening example of Newton's third law.

Take a nature walk in your backyard or local park to find one object for every letter of the alphabet. Then put them together in this handy nature book.

In this fun experiment, learn about brand awareness and the influence of media on children by testing logo recognition in different age groups.

In this cool project, create a lighted, scale model of the different layers of the Sun, including the core, radiation and convection zones, and photosphere.

Kids conduct a cool balloon rocket experiment in this fun science fair project idea. Does a greater volume of air mean a greater distance traveled?

Did you ever add salt to pasta? Did it help cook the pasta faster? If not, find out in this science fair project idea.

Let your young scientist explore a brave new world of sound with an experiment that just requires a handful of common household items.

In this science fair project, young children will become aware of and have the opportunity to experience the four basic tastes: sweet, sour, salty, and bitter.

In this science fair project, we'll explore how blocking the sun's light can stop those can stop photosensitive paper from changing color.

In this science fair project, kids start a chemical reaction that will make a balloon inflate itself!

This fall, make a leaf crown that will encourage creative play and your child's interest in the natural world while you help them build fine motor skills.

I scream, you scream, we all scream for homemade spearmint ice cream!

Does your middle school teenager have good reflexes? Gauge his reaction time in this science and math activity that requires only a yardstick and a friend.

Teach your creative second grader about proportions, animals, and proper cutting methods with cucumber carving.

Let your fourth grade chef mix up butter and sugar with scientific principles about different states of matter, and get delicious toffee, too.

Check out this fun and easy science fair project idea on germination of a seed and learn to identify exterior and interior parts of a bean seed.

Help your second grade scientist explore the timely topic of wind speed using a version of the classic Beaufort Scale.

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

Kids will explore the corrosiveness of soda in this cool science fair project by leaving pennies submerged in soda overnight.

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

In this activity, your child will transform an egg into a glowing, bouncy "ball" that they can play with.

This science exploration lets your first grader see how eggs can provide a perfect environment for a living, growing creature.

Teach your first grade scientist the difference between liquids and solids using maple syrup.

Is horse manure a possible energy source in a crisis? Use calorimetry to find out how much energy horse manure can produce in this science fair project.

Learn how to tell time by the sun with this cool science fair project idea that tracks how the accuracy of a sundial changes over time.

In this activity, your kid has your permission to get his socks nice and filthy. In fact, it's a necessity, because those socks are going to make a garden.

Make scented sensory cloud dough. Add it to a sensory table, activity station, or put it in a baggie for extra at-the-park entertainment!

Help your kindergartener identify and sort eight different kinds of common seeds on this "seed wheel" plate you can use all growing season.

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