What animals are most popular? This project affords practice in data-collection, record-keeping and data-analysis through the investigation of this question.

Here's a great activity that uses corks and toothpicks to create a fleet of floating boats. Which design makes for the most seaworthy vessel?

In this science fair project, students discover how sedimentary layers form as sediments like mud, silt and sand settle over time.

In this science fair project, you'll make a "ghost" appear in a test tube, and learn about what happens when hot water and cold water interact.

Put your second grade scientist to work this Fourth of July with our colorful "liquid fireworks" project!

Is it magic? No...it's the amazing, gravity-defying capillary action experiment! Kids will love this dramatic and enlightening science fair project.

Your kid will be captivated as she watches liquids change color before her very eyes during this fun science project that introduces some chemistry basics.

How does water pressure change with depth? Kids learn how pressure works underwater with this cool and easy demo.

Are you ready to be a detective for science? Then get out your magnifying glass and start studying fingerprints!

In this fun activity, your child will create their very own solar oven to bake s'mores!

Household items and a bit of imagination will create a CSI kit for your child to have investigative adventures with. Explore the world of forensic science!

Discover whether a metal will expand under hot water.

This homemade barometer allows your little scientist to contemplate and compare different air and weather conditions.

Perk up your front porch with this hanging vase craft, perfect for spring and for getting kids outdoors!

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

This project demonstrates the correspondence between the volume of water displaced by a submerged object and the volume of the object displacing it.

Combine your child's natural curiosity with his developing classification and writing skills by helping him create a backyard field guide.

This weather spinner will improve observation skills by encouraging children to examine and track weather details and patterns.

In this physics project, learn about the relationship between light intensity and distance using a laser pointer, flashlight, and graph paper!

What is topography? Kids find out by learning to make and read a topographic map in this awesome science fair project idea.

This activity provides a solution to all those leaves on your doorstep, while also giving your child a fun science lesson.

Magic, science, or household cleanser? Let your second grader decide with this practical, nontoxic chemistry experiment with acids and bases.

What keeps a an item cooler, polymer crystals or ice? Find out in this cool science experiment!

Observe with your third grader what happens when food starts to decompose, and boost science skills simultaneously with this experiment!

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

Make your own marshmallows and mix up some very interesting third grade chemistry lessons while you're at it!

Free science fair project idea that examines the differences between cats and dogs. Analyze objective qualities rather than subjective ones.

Here is a hands-on activity to help third graders understand the four points of a compass...and how we use them to get around.