Does your child always demand to know why the sky is blue, how the sun moves across the sky, or where wind comes from?

This science fair project idea demonstrates how our fingers prune when in water.

In this science fair project, students examine under what conditions individual plants release seeds and how far the seeds are released.

In this science fair project, students use hot and cold water to simulate what happens when a warm front meets a cold one.

Which public places harbor the most bacteria and germs? Test different environments to find out where the most bacteria live in this science project.

Determine whether a hot liquid cools off faster when liquid is added before or after a two minute wait.

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

In this science fair project, kids observe the expansion of liquids when frozen and determine if some liquids expand more than others in the freezing process.

How do we know that air exists when we can't see it, taste it, or touch it? Here's a classic experiment that will teach your kid some basics of aerodynamics!

In this science fair project, kids measure how weather conditions affect how fast a puddle evaporates.

The purpose of this science project is to determine whether the amount of air in a soccer ball affects how far it goes when kicked.

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

This science project lets students explore the number of spots on a ladybird and how to treat ladybugs with respect.

Kids often ask, "how tall am I?" This science fair project seeks to determine how well kids can guess their own heights.

How do crystals form? In this science fair project, students will use three different saturated solutions to see how different minerals form crystals over time.

Learn how to make a periscope with this cool engineering science fair project idea, and learn about optics to learn how a periscope works.

How does frost form? How fast does it form? Do this simple science project using a plastic glass, rock salt and some water to learn about deposition.

In this science fair project, learn how to make gears and find out why they transmit torques in predictable ways.

In this cool elementary school science fair project idea make a model to learn what happens to the Earth's surface when ice moves over land.

This project explores what happens to a rubber band when it is heated and cooled.

This science fair project examines how seeds hitchhike on animals and clothing.

In this experiment, students find out what happens when a less-dense fluid interacts with a denser one, replicating the effect of cooler solid rock on magma.

This science fair project idea investigates how different disinfectants work in killing germs.

This science fair project idea explores how water and ice can change the form of rocks.

Ever wondered how a plant drinks water? This science project will teach you how and help you create a beautiful floral display!

This science fair project idea measures out the sugar of various foods and find out whether people can correctly determine how much sugar is in common foods.

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.

Learn how to tell time by the sun with this cool science fair project idea that tracks how the accuracy of a sundial changes over time.

Create safe lightning for kids! They'll learn how to make lightning at home with this fun science fair project idea illustrating static charges and grounding.

This science fair project idea teaches that time always passes at the same rate and nothing we do in our daily life âreallyâ affects how fast it moves.