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

In this science fair project, we'll use a liquid crystal thermometer to find out whether exercising makes a difference in people's temperature.

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

Will potatoes spud or sprout faster in dry, dark, or cold conditions? Find out in this science fair project idea!

Science fair project idea which teaches you how to make butter by separating cream into butter and buttermilk.

What is topography? Kids find out by learning to make and read a topographic map in this awesome science fair project idea.

This science fair project idea determines if the size of the parachute will change the rate at which an object falls.

This science fair project teaches about mold. Students will test different foods to see which grow mold the fastest.

How does a kazoo, the strings of a guitar, or the speaker of a radio make sound? The purpose of this science fair project is to show how vibration makes sound.

What is persistence of vision? With this hands-on science fair project idea, students will demonstrate this cool and dramatic phenomenon in their own classroom.

Science fair project that examines the behavior of water and gravel in creek beds and the formation of sedimentary rocks.

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

This science fair project idea investigates how a bottom keel helps keep a boat from rocking back and forth.

This science fair project idea examines whether plants are still able to grow normally if they are turned upside-down.

How does a flashlight work? Kids will make a complete circuit and explore how voltage contributes to brightness with this science fair project idea.

In this cool engineering science fair project, kids learn how to build Hero's engine: an enlightening example of Newton's third law.

The purpose of this science fair project is to explore whether UV light passes through some colors and not others by looking at blue, red, purple, and clear.

Science fair project idea that examines different physical characteristics of a chosen animal. Make educated guesses about evolution based on animal's form.

This cool science fair project teaches kids about temperature, density and buoyancy using balloons that float with normal air. No helium required!

Build a 3d animal cell model with this cool science fair project, which helps kids visualize and understand the function of a cell's parts and organelles.

Science fair project that develops latent fingerprints on a non-porous objects by converting superglue from a solid state to a gaseous state.

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

Did you ever add salt to pasta? Did it help cook the pasta faster? If not, find out in this science fair project idea.

In this science fair project, students use the streak test to tell minerals apart from each other.

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 fair project idea explores whether the process used to dry the beans we eat for food renders them unviable.

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

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.

Do hand soaps and sanitizers prevent the growth of bread mold? If so, why? Kids will find out with this fun and informative science fair project idea.

This science fair project idea explores how the shape of a boat affects its density and how much weight it can float.