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This science fair project idea explores whether boiling and freezing water will have an effect on how much it weighs.

Determine which video game elevates the heart rate best and burns the most calories.

Compare the ignition rates of various types of flame-retardant materials.

How does salinity affect the point at which water freezes? Kids will find out by performing this cool melting ice experiment.

In this science fair project, young children notice and track changes in trees throughout the year.

Free science fair project idea that examines the impact of gravity on a dropped carton of eggs. Design a device to protect the eggs from cracking.

This science fair project idea investigates if webbed feet help a duck (and others) swim.

This project explores the effectiveness of various common household ingredients in cleaning tarnished and oxidized coins.

This project examines which style of central-air system filter traps the most particles from the air.

This experiment will explore if and where fractals can be found in the natural world.

Create your own light bulb and test filaments of different thicknesses to see which keeps the bulb burning for the longest time.

Check out this fun science fair project idea to explore fun facts about fruit juices and learn why do juices turn bad in the fridge.

The project researches how lubricants affect the mechanical advantage of a pulley.

Science fair project that examines how yeast grows, and which conditions allow for optimal growth. What types of nutrients does yeast prefer?

How fast is the wind blowing? This science experiment provides step-by-step instructions to help you answer this question.

The objective of this science fair project idea is to determine whether frozen vegetables have more nutrients than canned vegetables.

Slime: It's oozy, it's goopy, and it's just plain fun! Learn how to make slime with this fun science fair project.

Determine how different measurements of the same object might yield different values. Provide as many reasons that you can think of.

Science fair project that determines which materials cause the most friction by sliding blocks of wood down a ramp.

Science fair project that examines the relationship between fluid flow rate, pressure, and resistance.

What's the chemistry behind dyeing Easter eggs? Will adding vinegar to dye help the eggshell absorb the color? This colorful science project has the answers!

Measure the densities of various fruits and vegetables to determine if there is a relationship between density and nutritional value.

Help your second grader observe the phases of the moon, and then let the fun loose: he'll get to chart his observations with marshmallows!

In this "paper and pen" science fair experiment, students will research the difference between standard time and astronomical mean time.

This science fair project idea explores how enzyme inhibitors, active sites, non-competitive enzyme inhibitors, and substrates work.

This experiment will examine and precisely measure the amount of sugar in various sodas.

This science fair project idea identifies and understands adaptations in birds.

Which sunscreen is most effective at blocking the sun's harmful UV rays? Test the SPF of various sunblock brands in this cool science project!