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

Make water and clay play a little more scientific with this hands-on experiment that teaches displacement and shows how an object's shape affects its buoyancy.

Turn the common pastime of constructing paper airplanes into a lesson on the physics of aerodynamics and flight with this fun science activity.

This science fair project idea experiments with spinning color wheels and optical illusions.

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

All you need are pencils, paper and some scissors to get started on this easy and fun game to review astronomy information, or other types of study concepts.

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

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.

Get your hands on a concoction that breaks the rules about what's a solid and what's a liquid.

The next time you've got a restless second grade earth scientist on your hands, use this experiment to demonstrate crystals and make a tasty treat, too!

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

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.

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.

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

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.

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.

Help your child understand surface tension by showing them how they can create a "skin" on top of water.

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

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

Based on the concept of water's "freezing point," this activity entails the lowering of water's freezing point to chill ice cream!

Magnets may hold up papers on the fridge, but is it the paper that attracts them? Find out more with this kindergarten science investigation.

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

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.

Your third grader will delight in learning about sound waves as he observes the different sounds created by tapping on glasses with varying amounts of water.

Take this "paper plate snack test" with your child for a hands-on lesson in making healthier choices to teach your child about what's in his food.

Here's a fun science experiment that's refreshingly tasty too! Turn regular water into a tasty treat perfect for consuming on a hot day.

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.

This homemade barometer allows your little scientist to contemplate and compare different air and weather conditions.

Ready for takeoff! Make science fun and teach about levers and fulcrums as your child sends buttons flying.