Help your first grader explore the world of scientific measurement by "weighing" fruit with a "water scale"!

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

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

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.

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

Here's a fun activity to help build thinking skills in young first grade scientists, and to encourage them to have a blast exploring the mass and volume.

This experiment will explore how mallets of various materials and weight create sonic tones of varying lengths.

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

Looking for an enjoyable evening activity you can do with your kids? Study the stars: help them learn about constellations by making one of their own.

Check out this fun science fair project idea to learn about seismic waves and how fast they travel during an earthquake.

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.

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

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

This activity will help your child review science concepts, learn new ones, and become familiar with examples of various concepts in science. Plus, it's fun!

The objective of this science fair project idea is to determine if sound travels best through the air, water or a solid.

Do this experiment to help your first grader understand how salt can be removed from salt water. All it takes are a few household materials.

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.

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

Help your kid feel like a superhero with this safe and fun science experiment that creates an electrical charge that's like a mini lightning bolt!

In this free science fair project, learn how to separate salt from water using heat. A great science project for elementary school kids.

Get your fifth grader involved in some earth science by helping her plan and create her very own rock collection.