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

Make a periscope with milk cartons and mirrors! This preschool activity is great for playing secret agent and learning simple physics.

This science fair project demonstrates the magic of arches by challenging students to stack telephone books on top of eggs without breaking them.

This middle school project examines the strength of horizontal versus vertical pointing eggshells.

What is a compound microscope? Kids find out by making one of their own in this cool science fair project.

Determine the differences between various bicep exercises, both in terms of how much muscle exertion they create and how they affect your heart rate.

Find out whether pacing in long-distance running actually acquires for drastic changes in finishing times versus running super-fast at the start.

examine how passive solar heating works, measure temperature in a parked car on a sunny day. ways to use passive solar heating as an alternative, energy

This science fair project idea explores if objects dropped from a high distance will equal a greater impact force than the object dropped from a low distance.

This science fair project on testing water hardness is a great introduction to practical chemistry. Test and learn the difference between hard and soft water.

The goal of this science fair project is to attempt to build a perpetual motion machine and analyze the Laws of Thermodynamics.

Kids get step-by-step instructions for how to make a rubber band car and explore the physics of potential energy with this fun engineering science fair project.

High school students recreate Michael Faraday's experiment in this cool science fair project that induces current in a coil of wire.

Kids construct a single fixed pulley system to learn how pulleys can make work easier in this cool physics and engineering science fair project idea.

Future engineers, unite! Discover how to keep a sandcastleâs bridge from falling into the moat.

The Galileo inclined plane physics experiment was one of the first ways scientists calculated acceleration due to gravity. Do it yourself in this project!

In this fun design challenge, your child will get creative with making structures out of toothpicks and gumdrop candies.

Science fair project which determines whether people are more likely to follow rules if they are easy to understand.

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

Kids will conduct a cool limewater carbon dioxide test that can be performed with common household materials to learn about the chemistry of this common gas.

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.

In this insulation experiment, you'll learn which clothes keep you warm in the cold, and which make you shiver.

Explore concepts in current and coltage with these Van de Graaff generator experiments.

How does rust form? Kids will learn about the roles oxygen, water, and electrons play in rust chemistry in this cool science fair project idea.

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

What direction should solar panels face? It's not the direction you might think! This free and enlightening science fair project helps kids discover the answer.

This science fair project idea highlights decomposition rates by comparing how long it takes an item to decompose in a compost pile vs. a landfill.

Learn how to be a bird scientist in this simple project of watching feathered friends in their habitat.

Kids will make a homemade electroscope and explain how it detects static charges through induction in this fun science fair project idea.