Give your budding young observers a chance to discover simple machines at use in their own home.

For this science fair project, kids will learn how to make a lemon battery. They can conduct this classic experiment using readily available materials.

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

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

This 4th of July, explore fourth grade science and make some safe fireworks in your own backyard using soda pop!

This science fair project idea produces sounds by creating vibrations using different objects.

Amaze your kids by separating a salt and pepper mixture using an "electric spoon" charged with wool.

Show your child that the simplest ingredients (salt and water) can be used to illustrate the concept of density!

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.

Along with being an interesting science activity, dehydrated strawberries are also tasty â and healthy!

These flying potato poppers make a cool sound, create a celebratory mood, and they can teach your child about the power of air pressure.

In this fun activity, your child will create their very own solar oven to bake s'mores!

Encourage your child to think outside the bathtub by making her very own handmade soaps! Perfect as a present, a decoration, or just to pamper herself.

Making your own glass cleaner is easy, effective and inexpensive!

Popsicles aren't just for the summertime, this activity takes cold and turns it into a creative and tasty science experiment.

Believe it or not, images that are cast upon your eye's light-sensitive screen (called the retina) are upside down. Here's a fun, fast experiment to prove it!

In this science fair project, kids start a chemical reaction that will make a balloon inflate itself!

How sensitive is your skin? Here's a fourth grade science experiment that lets your child figure it out.

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.

If your fourth grader is obsessed with all things glow-in-the-dark, then here's an activity that will really light up her imagination!

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

How do mirrors work? What is light, and how does it travel? Explore light and reflection with your preschooler with these simple hands-on experiments.

What is it about a Slinky that causes it to walk down the steps? This simple experiment is a perfect illustration of both gravity and momentum.

What's the quickest way to separate salt and pepper? Let static electricity do the work! Your child will be fascinated by this simple experiment.

Show your child how and why the microwave works, while demonstrating just how strangely foods can behave while inside the crazy cooker.

Would your child like to learn about a hidden world? All she needs to do is open her box of markers!

Children combine an acid and an alkaline substance to simulate a volcano eruption in this fun experiment.

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

Deck the halls with last season's Christmas lights for a spectacular and electrifying science activity.

Teach your child how butter is created by shaking up cream the old-fashioned way.