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.

The goal of this science fair project is to assess the acidity levels of common food and household products using pH test strips.

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

The goal of this science fair project is to evaluate the effect of heat on sound wave frequency.

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.

Teach your preschooler some physics that she can relate to with this fun and simple activity!

In this cool sound resonance experiment, learn about frequency and pitch, and use a tuning fork to calculate sound velocity in air.

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

Blanket forts are a kid classic! Let your child create a âfortress of solitudeâ on his own for reading, telling scary stories or for cozy cocooning.

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

This is a fun way to introduce kids to the concept of volume, and give them a quick hands-on activity to boot.

Look for a correlation between temperature and the intensity of cricket chirping. Measure ambient temperature and sound intensity in decibels.

In this cool science fair project, kids apply basic algebra to learn how to make a PVC pipe instrument while exploring concepts like frequency and resonance.

This science project examines the history of earthquakes and what we can do to prevent future disasters.

This project examines Newton's First and Second Laws of Motion with a bicycle and water balloons.

What's the difference between centripetal and centrifugal force? Students find out by seeing both in action as they conduct this experiment.

In this fun science fair project idea learn the difference between additive and subtractive color and why they are handled differently.

Take to the air with science by experimenting with helicopter seeds right in your own backyard!

What's cooler than an explosion? Not much! This simple science experiment lets kids build their own pop rocket. So put on your safety goggles and let her rip.

In this science fair experiment, students learn about the scientific principles behind Doppler ultrasound.

In this project students determine which instruments composers use to create birdsongs and birdcalls in classical music.

Discover the force of water! This article provides step-by-step instructions for creating your own science experiment.

In this science fair project, young children discover what happens when two fluids that have different densities get together.

Show your kids the power of baking powder by conducting a simple experiment. Make four batches of cornbread, all identical except for one thing: baking powder!

This science fair project idea studies how talking on a cell phone affect driving?

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.

This experiment investigates whether there are certain sounds that affect men and women differently

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

Your second grader will love this simple soda bottle race car activity. Make a ramp and customize your car for an entertaining way to learn scientific concepts.

Learn how to make marbleized paper with simple everyday ingredients in this fun activity! Your child will learn about oil and water while doing this project.