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Get a cool middle school chemistry project idea on how to determine whether a physical or a chemical change has taken place.

Find a mathematical relationship between the intensity of a sound wave and distance from the sound source. Use a pedometer and a sound level meter.

Show your preschooler how to create a simple windsock using a colorful piece of tissue paper, a pipe cleaner, and yarn.

This activity works well with a group or just with a parent and child, and it can make a great party game since it's both fun and inexpensive.

In this sound experiment children listen for differences as they tap on a bag of air, a bag of water, and a wooden block held up to their ears.

Science fair project in which you will start a fire from scratch without using matches or a lighter.

Find out the differences (if any) in the frequencies of voices produced from a computer, from a phone, and directly coming out of the voice box of a human.

Here's a fun activity that will introduce your fourth grader to the concept of frictionless motion by constructing a hovercraft.

This science fair project idea creates a sedimentary rock and to investigate what takes place during the rock cycle.

Research and understand basic computer science. Build a simple computer, following instructions found online. Design a new or improved feature.

Discover whether different amounts of water added into a wine glass will produce a different pitch when their fingers are rubbed along the rim.

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.

If you hold a fire up to a balloon, it pops instantly. What if you could prevent this from happening? In this project, we do just that.

This is a fun and inexpensive project and it's a great way for your child to build basic geometry skills, like shape recognition and pattern/angle familiarity.

Show your preschooler how to make a print of a butterfly using her hand as a tool--a great way to stimulate her sense of touch.

In this activity, find out who the flowers' "partners in crime" are by being a flower spy!

Learn about this simple machine and make a pulley of your own to use for fun science trials.

With this science fair idea, little scientists will gain valuable insights into the physics behind throwing a baseball.

With a clear bottle and a few plastic straws, you can easily make a hummingbird feeder and demonstrate the effects of atmospheric pressure at the same time!

Science fair project that demonstrates how a rainbow forms, by using water to split white light into its many colors.

Create a mini plant habitat with your kid to help teach him what it takes to make an ecosystem work.

Create a habitat for a butterfly right in your own backyard, and build your first grader's science knowledge while you're at it.

How do you tell time without a watch? Use the sun! This simple activity will show your child how to build his own sundial.

Science fair project that examines what causes thunder and why a thunderclap sounds so loud. How is lightening related to the creation of sound waves?

Creating a home for a toad is an easy and fun project for kids. Here's how to make your very own toad abode.

Got a young scientist at home? Try this project with him!Create your own molecule design with this home-made clay recipe and some toothpicks!

In this science and engineering activity, children will explore types of tunnels and their purposes and then design and build a tunnel of their own.

Here's a math, science, and social studies activity: help your kindergartener become a "coin archaeologist" by examining how different coins look and feel.

Kids will make a beautiful rainbow in a jar and learn what enables different types of liquids to remain distinct in separate layers.

Here is a kindergarten activity that blends art and science by using magnets, paint, and objects found around the house to create a picture.