This science fair project idea investigates the difference in reaction times between boys and girls.

Tree rings can tell the age of the tree but also information about the world. This science experiment uses tree stumps to discover new facts.

Did you ever add salt to pasta? Did it help cook the pasta faster? If not, find out in this science fair project idea.

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

This science fair project teaches students the differences between fruits and vegetables.

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.

This science project challenges students to learn about and classify weeds and discover new practical uses for weeds.

Discover whether cold or hot water from the faucet will boil faster on the stove.

How greasy are your potato chips? Students will use a reliable method to quantify greasiness and compare different brands in this great science fair project.

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

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

Learn how to demagnetize a magnet and how physics can explain this phenomenon with this enlightening science fair project.

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.

Kids will learn about the interaction of lactose and lactase in milk and discover why we describe enzymes as catalysts in this fun science fair project.

Use chemical analysis to identify a variety of mystery powders that look the same but actually have very different properties.

This science fair project idea examines the reason boats are shaped and engineered.

These science fair experiments demonstrate the chemistry of rust and the oxidation process.

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

Your child can explore the wonders of science, and the concept of dehydration, along with creating a healthy and tasty treat!

Show your child how to construct a homemade thermometer. It's hands-on fun and a great way to learn about this important instrument!

This science fair project idea determines if the temperature of rubber effects how high it bounces.

In this activity your child will create their very own marble maze!

What's the difference between a microwave and an oven? Use mashed potatoes to explore which kitchen appliance does a better job at keeping food warm.

Learn how to make an anemometer with step-by-step instructions in this cool science fair project idea for 4th grade.

The objective of this science fair project is to observe the differences in heat absorption for darker colors vs. lighter colors.

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

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

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

This science fair project idea examines whether adding gelatin causes a solid to have a higher melting point and/or melt slower.

This science fair project idea investigates if fats add to the flavor of food.