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Does electricity move better through thick wires or thin ones? kids will conduct this classic electricity experiment for this science fair project.

This science fair project idea explores how length affects the weight a bridge can hold.

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

In this windmill model science project, you will build a windmill to learn about wheel-and-axle machines and how these simple machines are used to do work.

Kids explore how a single movable pulley can confer a mechanical advantage over a fixed pulley in this cool engineering science fair project for 2nd grade.

The objective of this science fair project is to examine the basic principles of air pressure using simple materials like a balloon, straw and string.

In this activity your child will make a coiling snake out of simple household materials, and also find out why they coil.

How do people move pianos and heavy furniture into tall buildings? Show your kids some pulley potential with this simple household exercise!

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

Kids learn about potential energy, and mechanical energy, and how to make power from water with one of our favorite renewable energy projects for kids.

Got a birdwatcher on your hands? Bring the birds to your backyard by making a zany bird feeder using an orange and some string.

An home science experiment for older students that teaches about the science behind heat.

This science fair project idea investigates if heat from direct sunlight is hotter than heat from reflected sunlight.

Make a lei and bring a touch of the tropical lifestyle into your home!

Can a toy car determine the strength of a magnet? In this cool magnet science fair project, young scientists will learn how to measure the strength of a magnet.

Science fair project that examines the behavior of water and gravel in creek beds and the formation of sedimentary rocks.

How do series and parallel circuits work, and which produces the brightest light in a light bulb? Construct both in this project and find out!

Kids conduct a cool balloon rocket experiment in this fun science fair project idea. Does a greater volume of air mean a greater distance traveled?

How does a flashlight work? Kids will make a complete circuit and explore how voltage contributes to brightness with this science fair project idea.

Learn about this simple machine and make a pulley of your own to use for fun science trials.

Kids will love making sugar crystals in this sugar crystal science fair project which teaches important chemistry concepts like saturation and solubility.

This science fair project explores how osmotic pressure forces water through the root up into the plant.

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

This science fair project idea investigates the hardness property of minerals.

Is your child a nature nut with an eye for creative, green-friendly projects? Introduce them to this amazing DIY bird feeder!

Learn how to make a weathervane with this fun and simple meteorology project for fourth graders.

This science fair project idea attempts to train a worm to complete a simple maze in order to find out if worms can learn and remember.