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!

This educated-guessing game is great for preschoolers. This activity helps your child work on her reasoning skills.

This science fair project teaches kids experimental design and how to test if subjects can really sense if they are being watched.

Use this fun activity to make an optical illusion picture that helps your kindergartener explore the sense of sight, and sharpen his observation skills!

In this project, create and examine garden mulch to find out what critters live in the messy, muddy layers just above the soil.

This science fair project idea studies which brand of wintergreen candy produces the most sparks in the dark.

An hour glass, also known as a sand clock, keeps time. In this activity, your child will make her own sand clock and measure the time it keeps.

This science fair project explains the process of how the lungs expand and contract with the help of the diaphragm.

Brighten up your home with this fun activity! Make a summer sun print and teach your child the art of easy print making.

First graders are learning to think like scientists. What better place to start, then by raising tadpoles? This hands-on activity explores science in action!

Check out this fun science fair project idea for 1st grade: a solar eclipse model that demonstrates total, partial, and annular solar eclipses.

For a fun family activity to introduce your child to genetics, have your child go on a search for dominant and recessive family genes!

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.

Have you ever noticed the way a dropped stone makes a fun pattern in a pond or lake? What's the science behind these splashy occurrences?

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.

Hatch a praying mantis egg case in a homemade habitat with your child's help! This is an amazing experiment in science and nature for kids of any age.

In this activity, young learners will make a balance using a plastic hanger and weigh a variety of small objects using candy corn.

Create safe lightning for kids! They'll learn how to make lightning at home with this fun science fair project idea illustrating static charges and grounding.

What is the best stain remover for clothes? In this fun and easy science fair project idea, students will identify the best method for laundry stain removal.

In this science experiment, do tensile strength test on fishing line, a strand of hair, a rubber band, and any other materials you're curious about!

Science fair project that examines condensation and the conditions needed in order for dew to form.

Your third grader will be amazed at the explosive combination of vinegar and baking soda in these chocolate volcano cupcakes with white chocolate "lava."

Play with balance and simple engineering as you hurry to create a sturdy rock tower.

In this fun guessing game, your child uses his sense of smell and taste to figure out what is in the container. Here's how to play:

In this project, you'll build a model of the earth, complete with all seven continents and four major oceans.

In this science fair project, students make their own rain gauge to measure rainfall.

Introduce your child to the importance of preserving the world's biodiversity by turning a lesson on endangered species into a fun game for the whole family.

How to test for acids and bases? In this activity you and your child can make your own indicator from red cabbage!

Can't make it to the beach? Bring the science of ocean waves home with this fun earth science-related craft.

Could there be toxic chemicals lurking in the cupboards and closets of your home?