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

How does a compass work? What's a magnetic field? Kids will build their own compass at home to find the answers in this great science fair project idea.

Make "fossils" with your child to hide in the sandbox or at the park or the beach, to help your child explore his archaeological side.

Use dirt and different colors of craft sand to make unique layers in a clear plastic cup to represent the layers of the Earth.

Using an empty tennis ball can and a swimming pool, you will determine if it's possible to have a conversation under water.

This easy Halloween-themed science experiment for first-graders is perfect for chilly October afternoons or great as a Halloween party activity.

In this experiment you observe and determine how well your cat uses his whiskers to navigate through a maze.

How does smell affect taste? Ready your taste buds--in this project, you'll gather some test subjects and do a taste test to see how much smell affects taste.

Your third grader will delight in learning about sound waves as he observes the different sounds created by tapping on glasses with varying amounts of water.

This engaging project encourages young children to practice and refine the important scientific skills of sorting and classification.

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

Use simple materials to build a "worm hotel" with your kindergarten soil scientist...and see what worms really do all day.

Do you think you could walk around upside down -- with your feet in the air and your head on the ground?

Help your child get to know the least-appreciated of the five senses, the sense of smell, with a smelling station.

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

How does a kazoo, the strings of a guitar, or the speaker of a radio make sound? The purpose of this science fair project is to show how vibration makes sound.

We all know that the Moon has different phases, but it can be hard to figure out why. Try this activity to see how the Moon's phases really work.

Climates with more snowfall have more coniferous forests and fewer deciduous ? Learn about how pine trees in a coniferous forest adapted to withstand snow.

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!

Before you get ready for a delicious scramble or omelet, add a bit of science to your morning routine!

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

This surprisingly good glue recipe comes from common kitchen items.

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

Introduce your child to the world of motion and physics with a bit of marble play inspired by Sir Isaac Newton!

Create homemade seed packets with your kids. This activity combines your kids' love of science and the outdoors with a little writing and drawing fun.

Take this "paper plate snack test" with your child for a hands-on lesson in making healthier choices to teach your child about what's in his food.

Science fair project that examines the different types of precipitation, evaluates the density of snow and calculates the ratio of snow-to-liquid.

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

This science experiment tests whether warm or cold water works best in making cut flowers last longer.

This tactile activity helps kindergarteners learn about texture.