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

This science project has students collect wood samples and invent new uses for different types of wood based on its properties.

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

This science project teaches students the relationship between compost and plant growth. Students conduct an experiment with different types of compost.

In this classic Ivory soap experiment, kids learn what happens to different types of soap in the microwave, and why!

This science project uses Mohsâ Hardness Test to show kids how to compare the hardness of different types of minerals.

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.

Science fair project which tests various sedimentary, igneous and metamorphic rocks to find out whether one rock family is stronger than the others.

Magnets vary in strength. Have your young scientist figure out which kind of magnet is the strongest when you have him conduct this attractive experiment.

Determine if gender affects the ability to identify different smells.

Science fair project which determines whether the size or the thickness of a piece of paper has an effect on how many times it can be folded in half.

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

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 idea compares biodiversity between drops of water.

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

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

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

Gather some friends for a bubbly soda taste test do determine calories' role in your favorite drinks.

Learn whether Mylar Balloons last longer than Latex Balloons or vice versa.

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

This easy and inexpensive paper towel science project introduces kids to important physical concepts like cohesion, adhesion, and capillarity.

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

This science fair project idea examines the reason boats are shaped and engineered.

Learn how to make a ping pong ball anemometerâa device used to measure wind speedâin this free science fair project idea.

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

This science fair project teaches students the differences between fruits and vegetables.

This science fair project idea explores whether talking to a plant will help it grow.

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.

This science project teaches students to classify different shapes of leaves.

This science fair project idea creates a sedimentary rock and to investigate what takes place during the rock cycle.