Kids explore how a single movable pulley can confer a mechanical advantage over a fixed pulley in this cool engineering science fair project for 2nd grade.

Kids learn about examples of mechanical weathering and conduct an experiment with seeds and plaster in this cool geology science fair project idea.

Learn how to convert gravitational potential energy into mechanical energy in this fun science fair project idea.

The project researches how lubricants affect the mechanical advantage of a pulley.

Do plants get crowded? Have your curious kid investigate how plants respond if they're forced to grow together in a confined space.

Check out this cool science fair project idea to explore the risk of mechanical deterioration of artifacts placed in a storage box due to mold outbreaks.

Prove that the Earth is not flat. The objective of this science fair project is to measure the angle of the sun and calculate the circumference of the Earth.

Collect meteorite dust with a magnet in your very own backyard! The objective of this science fair project is to gather meteorite dust to study outer space.

Calculate the mass of the Earth using the sidereal and calendar period of the Moon and Newton's Law of Universal Gravitation in this physics science project!

Investigate the advantages of the use of ceramics in engines such as the tiles used in Space Shuttle. Use iron filings and magnets.

Science fair project which measures the shadow cast by a meter stick at various times in order to predict the circumference of the earth.

Learn about the layers of the Earth and make a model! Create a earth layer book, cake, or clay diagram.

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

The purpose of this project is to determine if there are fluctuations in the rising and the setting of the sun and the position of the earth as it rotates.

This science fair idea project identifies the active ingredients in soap and experiments with the properties of soap.

What if the shape of the Earth weren't spherical? How does its shape affect our gravity, climate, and tides? Model these questions in this cool project!

Measure the speed of the earth's rotation using protractors and meter sticks. This science fair project measures the angle of the sun in relation to earth.

Kids will discover the meat science behind the meat they eat, and find out how to use safe chemistry to make meat more tender.

This science project has students study the idea of human beauty.

In this cool elementary school science fair project idea make a model to learn what happens to the Earth's surface when ice moves over land.

In this experiment, you will find out how human error can cause faults in any science task. This includes experiments conducted by famous scientists also.

With Halloween right around the corner, find a way to use your brain and reward your tummy with a new type of science -- candy science!

In this windmill model science project, you will build a windmill to learn about wheel-and-axle machines and how these simple machines are used to do work.

This science fair project tested various nose cones to determine which would be the most ideal shape for propelling a water rocket.

Science fair project that illustrates the properties of black holes in space.

Kids get step-by-step instructions for how to make a rubber band car and explore the physics of potential energy with this fun engineering science fair project.

Science fair project which examines the chemical reaction of a candle flame with various gases in order to determine the identity of the gas.

Consult mechanics, automotive specialists for advice. Build a real engine or a scale model. Test and demonstrate its mechanical properties.

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

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