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This experiment will investigate whether reward or punishment is more apt to motivate people.

Science fair project in which you will start a fire from scratch without using matches or a lighter.

This science fair project idea attempts to train a worm to complete a simple maze in order to find out if worms can learn and remember.

This science project examines the effectiveness of various types of laundry detergents on stains trapped on a white handkerchief.

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

Science fair project that examines how yeast grows, and which conditions allow for optimal growth. What types of nutrients does yeast prefer?

Young physicists will wrestle with a discrepant event: the Hammer Ruler Trick. They'll make some inferences about torque, balance, and center of gravity.

This science project teaches students about organic farming and the benefits and disadvantages of commercial plant food.

Science fair project which uses a camera to observe the surface of a balloon in the moment of its explosion.

Free science fair project idea examining how different types of water affect plant germination and growth.

Become familiar with ratios and learn how to measure the diameter of the Sun and the Moon in this fun science fair project idea.

Is it possible to trick the forces of nature that make your bubbles round to create a square bubble?

In this cool science fair project, kids apply basic algebra to learn how to make a PVC pipe instrument while exploring concepts like frequency and resonance.

Students will investigate the thermal conductivity of metals by learning how to measure thermal conductivity with this fun and easy science fair project idea.

In this science fair project, students test how objects float and sink in liquids of different densities.

Science fair project which helps you determine your latitude by using an astrolabe, which measures the angle between the North Star and the horizon.

Can you imagine a sky filled with bright, colorful bubbles? Make this whimsical scene come alive with bubble science!

This science fair project idea examines the distance a person travels on an average day and to relate that to an understanding of the size of the Earth.

Science fair project that uses distillation to convert salt water into fresh water.

Kids will love making sugar crystals in this sugar crystal science fair project which teaches important chemistry concepts like saturation and solubility.

This science fair project idea determines what household items are good conductors of electricity.

Science fair project in which you will attempt to throw a ball the greatest horizontal distance possible by using different angles.

Learn about savanna flora and fauna in this science project! Take a look at characteristics of tropical grassland plants and animals that help them survive.

Determine whether magic salt is more effective at melting snow than regular salt. Pour one ounce of salt over the ice cubes, compare the melt downs.

This science fair project determines the quality of a given product.

Do you think heat can affect a plant's growth rate?

Science fair project in which you will graft branches from different fruit tree onto a root stalk.

This science experiment tests why guacamole goes brown and if leaving the pit in will stop guacamole from turning brown.

Check out this fun and easy 4th grade science fair project idea that tests how gravity induces positive and negative geotropism (gravitropism) in bean plants.

How does a compass work? What's a magnetic field? Kids will build their own compass at home to find the answers in this great science fair project idea.