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.

Science fair project in which you will examine how crystals are formed by creating your own crystal using charcoal briquettes, salt, and ammonia.

The objective of this science project was to build a model of a volcano and observe reaction between different substances, including baking soda and vinegar.

Kids will build a turtle habitat in order to observe the climate preferences of this cold-blooded reptile.

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

How powerful is the reaction between baking soda and vinegar? Find out here!

Watch pre-packaged seeds and seeds taken from inside fruits and vegetables grow. Which ones will grow faster? Read more in this science fair project idea.

In this science fair project, students create their own miniature salt flats at home.

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

In this science fair projects, students will grow out the bacteria that collect on air conditioner filters.

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

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

Science fair project that identifies the differences between soils from different environments and attempts to figure out why those differences exist.

This science fair project teaches kids experimental design and how to test if subjects can really sense if they are being watched.

In this project, learn about animal vision and different kinds of eyes: ocelli, compound eyes, and camera eyes. Find out what a jellyfish or grasshopper sees!

Do you think you can blow down a sand castle with a mighty wind? Find out which material stands up best to erosion in this erosion experiment.

You've heard the expression "burn rubber" but do you know how heat affects rubber? Examine the impact of temperature on rubber in this fun science experiment.

Science fair project that examines condensation and the conditions needed in order for dew to form.

The project examines absorbent polymers absorbency in disposable diapers and their unique ecological problem to the environment.

The project investigates how friction affects motion by using different surface textures.

Learn about where colors come from and how light absorption works in this fun experiment! All you need is a flashlight, construction paper, and cellophane!

Free science fair project idea that examines the differences between cats and dogs. Analyze objective qualities rather than subjective ones.

Will increasing the amount of salt in water effect how slow or fast the water freezes?

In this science fair project, apply the principles of leverage and force by building six simple machines designed to set weights in motion.

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

This simple heat transfer experiment is a great introduction to the concepts of heat transfer and conduction.

This science fair project idea explores plant growth from a bulb, root, and a stem and investigates asexual plant reproduction.

This science fair project investigates whether tapping the top or the side of the can will stop a vigorously-shaken can of soda from exploding.

This science fair project idea investigates the ability of different whitening toothpastes to whiten teeth.

Check out this science project idea to compare organic produce to non-organic produce and how preservatives in food extend the shelf life of goods.