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This science fair project idea investigates how the height at which a pendulum is released affects the length of time it continues.

In this popcorn experiment, students can explore how two things made out of the same material can have very different appearances and densities.

In this project, you'll build a model of the earth, complete with all seven continents and four major oceans.

What's the science behind those out-of-sight roots? Find out if you can trick roots into growing in different directions.

What is surface tension? Kids will discover how water-skating insects use surface tension to keep from sinking by making a model water walker.

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

Explore scientific concepts with this experiment that introduces kids to the scientific method!

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

In this activity, your child will be challenged to build a tall tower out of building bricks! The instructions include questions prompts to guide students through the design challenge.

How does smell affect taste? Ready your taste buds--in this project, you'll gather some test subjects and do a taste test to see how much smell affects taste.

In this free science fair project idea, we learn about surface tension and how it can support mass—in this case, a floating paper clip.

Can you dig it? This science experiment isn't for kids who like to keep their hands clean.

While your cells are much too small to see without a microscope, you can create the look of a cell in your very own home with just an egg and vinegar!

Alive or not? This yeast experiment you can conduct with your little scientist explores the answer to this timeless question.

Saturn is the ringed planet in our solar system, a gas giant with rings made of ice and dust. Let's make a cool scale model with an old CD and some glitter!

Science fair project examining barometric pressure, and how it can be used to predict the weather. How does atmospheric pressures relate to weather conditions?

Science fair project that examines how winter storms form and the relationship between temperature, moisture and snow.

Check out this cool science fair project idea that models the behavior of the cold desert plants: xerophytes and halophytes.

In this experiment, kids will see if pruning tomato plants makes them more fruitful and learn about the factors that contribute to a plant's fruit production.

In this plastic wrap science fair project, you'll learn about polymer permeability and find out which plastic wrap keeps food from dehydrating best.

Can a toy car determine the strength of a magnet? In this cool magnet science fair project, young scientists will learn how to measure the strength of a magnet.

How do icicles form and what do they look like? Do this free science fair project and watch the formation of icicles occur right before your eyes.

This science project challenges students to study deer behavior in their natural habitat- the feeding patterns, social behaviors, male to female ratio, etc.

Kids will learn how to make a thermometer to to explore liquid density in this great science fair project. Which liquids are affected by temperature the most?

Learn how to tell time by the sun with this cool science fair project idea that tracks how the accuracy of a sundial changes over time.