Sink or swim? Calculate the density of various fruits and vegetables using water and a kitchen scale.

Amaze your kids by separating a salt and pepper mixture using an "electric spoon" charged with wool.

Learn how matter transmits sound with a simple, hands-on experiment using sand, water and air.

Show your child that the simplest ingredients (salt and water) can be used to illustrate the concept of density!

Here is a nifty science experiment using Epsom salts to make "frost" appear on a piece of glass.

Using simple materials found around your home, you can reinforce the static electricity concept by helping your child build a simple device with zapping power!

Here's a classic celery science experiment that uses celery and food coloring to demonstrate how plants absorb water.

Science fair project the demonstrates Newton's Third Law using a milk carton filled with water.

Think you can blow up a balloon without using your mouth? This isn't just a cool trick, it's also a great way to introduce chemistry and biology concepts.

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

By using static electricity generated from their body, a child can cause a small fluorescent lamp bulb to light up!

Have your child try this classic experiment that demonstrates circular motion using a bucket and rope. Be careful, you might get soaked!

Experiment with magnetism in this 8th grade science activity in which your child will create a working compass using a steel needle, magnet, and jar.

Every time a sound is produced it emits a sound wave. This experiment demonstrates how sound travels, using nothing more than a spoon and a string!

Your child will do a fun science experiment using soap and pepper flakes to help understand the concepts of water molecules and the surface tension of water.

Here's an investigative activity in which your child will discover real-world names and uses for sugar and find out how it is hidden in many different foods.

Make your own helicopter using a paper clip and a sheet of paper. Hold the spinner up in the air, let it go, and watch it spin gracefully to the ground.

Show your fifth grade scientist how to create a siphon using two buckets, plastic tubing, and water. Watch her astonishment as the water travels uphill!

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

This trick uses vertical and horizontal forces to help your child to push apart your hands apart, no matter how hard you try to keep them together!

Bring the magic and mystery of the night sky to the light of day with this fun constellation art project!

When you see those sunscreen "protection levels," what does that really mean? Try this experiment to find out.

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!

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

Help your child get a grasp on what it was like to build gigantic ancient structures with this easy engineering activity about science and physics.

Believe it or not, the common spud has enough electrochemical energy to power a small digital clock.

Along with being an interesting science activity, dehydrated strawberries are also tasty â and healthy!

These flying potato poppers make a cool sound, create a celebratory mood, and they can teach your child about the power of air pressure.

Has your child ever asked you how a submarine works? Here's a simple bathtub project that will make for a hands-on answer.

Make meringues with your first grader and see how states of matter can transform before your very eyes. Here's how: