This science fair project idea develops an understanding through experimentation of which shapes are the most structurally strong.

What's the difference between a microwave and an oven? Use mashed potatoes to explore which kitchen appliance does a better job at keeping food warm.

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

What do ants eat? Kids find out by observing a colony of ants in this cool zoology science fair project for 4th grade.

In this experiment you observe and determine how well your cat uses his whiskers to navigate through a maze.

In this science fair project, students discover how sedimentary layers form as sediments like mud, silt and sand settle over time.

This activity challenges students to use computational thinking as they create a sequence of commands that will make a robot navigate around several obstacles.

In this exciting and empowering challenge, your child will construct a bridge using marshmallows and toothpicks!

In this cool science experiment, learn about magnetism and poles, and test magnet strength to find out if two magnets are twice as strong as one.

This science fair project idea experiments with spinning color wheels and optical illusions.

In this design challenge, your child will make a bottle rocket using typical household items.

Enter the buzz worthy world of bee watching and find out what time bees like to wake up!

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

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

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

Cinnamon is tasty, but does it have super powers as well? Find out if cinnamon can repel mosquitoes in this outdoorsy experiment.

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

The purpose of this science fair project is to demonstrate how yeast, a fungus, causes bread to rise.

Along with being an interesting science activity, dehydrated strawberries are also tasty â and healthy!

In this science project, the center of gravity is explored.

In this project, waves of vibrations are experimented with using water in glasses.

This science fair project idea investigates how optical distances change the apparent size of an object as seen through a magnifying lens.

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

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

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

Explore the scientific concept of capacity by seeing how many pennies you boat can hold before it sinks!

This science fair project idea explores the different properties of matter.

In this free science fair project, learn how to separate salt from water using heat. A great science project for elementary school kids.

In this outdoor science activity you'll find tips on how to create a nature journal by choosing a native plant or animal and tracking that species.

The moon doesn't produce its own light, so why can we see it shining in the sky? Learn about reflection and planetshine in this fun and easy science project!