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Challenge your learner to design and build a city of their own in this creative engineering activity.

Do different types of oil mix or stack? Find out in this science fair project idea!

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

How would you dry your wet clothes if your dryer didn't work? Find out with this fun experiment!

Discover whether different amounts of water added into a wine glass will produce a different pitch when their fingers are rubbed along the rim.

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.

In this science and engineering activity, children will explore types of tunnels and their purposes and then design and build a tunnel of their own.

Get this cool science fair idea to explore how arctic tundra animals change their behavior and adapt to survive in long, cold winters.

Science fair project that determines whether lettuce that is harvested gradually yields more produce than lettuce that is harvested all at once.

Can you increase the light and plant growth in your garden using mirrors? In this experiment, measure light reflection and find out!

Check out this fun science fair project to make a vinegar and baking soda balloon and demonstrate how gas is created as a result of the chemical reaction.

This science fair project idea provides evidence that air is everywhere and takes up space.

Would it hurt to skip brushing your teeth just this once? Let's find out by seeing which foods produce the most mouth bacteria.

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.

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

There are many benefits to bugs and insects. This science project shows how cockroaches, termites, and other critters benefit our planet.

This science fair project idea determines if crystals will absorb food dye and if colors will mix by the process of diffusion.

Have your child kick off their summer vacation by making a miniature water slide!

What causes the seasons to change? Kids find out by modeling the earth's tilt using a globe, flashlight and graph paper in this cool science fair project idea.

Test out the pH levels of soil in your backyard versus soil in more wild environments to solve this science case.

Observe how your brain works while it is focused on one thing, and how it works while you are distracted by another thing.

In this activity, students will create a stop motion animation by creating a clay figure and taking a series of digital photographs.

Take a dive into the candy jar with this yummy science experiment.

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

The goal of this science fair project is to discover the science behind carbonated soft drinks and apply this knowledge to create a new one.

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

Science fair project that examines the different types of precipitation, evaluates the density of snow and calculates the ratio of snow-to-liquid.

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

Ever wondered how a plant drinks water? This science project will teach you how and help you create a beautiful floral display!