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

In this fun science fair project idea learn about the multiple sources of radio waves and fin out how difficult it is to block them.

The objective of this experiment is to identify common materials that absorb sound waves with the greatest efficiency.

How fast does light travel in different mediums? Kids conduct a cool refraction experiment in materials like water and air for this science fair project.

Design a hearing protection device to protect their ears from loud noises. Examine the properties of current protective hearing devices, materials.

Use reusable, recyclable materials--along with a dose of imagination--to build a castle with first grade geometrical forms.

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

Invite your fifth grader to test the different rates of liquid absorption in synthetic and cotton materials, such as nylon and cotton.

Bring back the groovy memories by making shrinky dinks using household materials, while learning about the science of plastics. Here's how to get started:

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!

This classic children's game-connecting two cups with a string-demonstrates sound's ability to travel through air vs through a solid.

Is it solid or liquid? Create oobleck and witness the amazingly weird oscillation between the two!

Teach your little scientist about the amazing powers of gravity by comparing the falling speeds of two yummy fruits

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.

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!

In this Halloween-themed activity, young learners will find out what happens when they mix two household items together to create a surprising chemical reaction.

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.

On the next chilly, winter day, invite your fifth grader to make a hand warmer by experimenting with the loaded combination of a few natural ingredients.

Inspire your child to put on her engineer hat for the day, as she builds her very own, double-decker bridge.

How powerful is the reaction between baking soda and vinegar? Find out here!

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.

This classic children's game demonstrates how sound travels through air vs. through a solid.

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

Have your child build his own mini waterfall, and help him develop his planning, problem solving, and architectural skills.

Observe how your brain works while it is focused on one thing, and how it works while you are distracted by another thing.

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

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

This science fair project idea explores whether talking to a plant will help it grow.

Illustrate the idea of light refraction with this exciting and mystifying experiment.