Play with balance and simple engineering as you hurry to create a sturdy rock tower.

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

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

Kids construct a single fixed pulley system to learn how pulleys can make work easier in this cool physics and engineering science fair project idea.

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.

Kids use applied math to build and test a parabolic mirror solar hot dog cooker in this cool engineering science fair project idea for middle school.

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 how to make a simple electric motor in this great engineering science fair project that teaches them how current generates its own magnetic field.

Learn how to make a periscope with this cool engineering science fair project idea, and learn about optics to learn how a periscope works.

Science fair project which simulates the global conveyor belts on a small scale, and observes the effects of wind, density and temperature on water movement.

In this experiment you explore how tectonic plates move to create land and expand bodies of water.

Design and build an invention inspired by Rube Goldberg's designs. Build your invention. Test the machine, write a detailed report.

This project leads to an understanding that a whole may be built of smaller parts that fit and work together and provides an introduction to basic tools.

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

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

This project explores the interaction between air pressure and playing surface in determining a basketballâs bounce.

Glass is see-through, but usually you can still see that it is there. In this experiment, we use baby oil to make glass go completely invisible.

This science fair project idea explores whether a plastic slinky works as well as a metal slinky when walking it down the stairs.

Study the effects of wind and temperature on evaporation. Place wet sponges in different environments, check at regular intervals, track time required to dry.

Science fair project that builds a magnetometer and demonstrate its uses.

Do you hate to waste energy? In this experiment, you will design a machine that is powered by the process known as energy transformation.

Free science fair project idea that examines the impact of gravity on a dropped carton of eggs. Design a device to protect the eggs from cracking.

This science fair project idea designs safe bicycle routes using GPS.

This science fair project idea explores how length affects the weight a bridge can hold.

This science fair project demonstrates the magic of arches by challenging students to stack telephone books on top of eggs without breaking them.

This science fair project idea examines the actual cost of three household light bulbs by testing energy consumption.

Build basic projector out of ordinary materials. Create several color transparency slides, demonstrate your creation.

In this science fair experiment, students learn about the scientific principles behind Doppler ultrasound.

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