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Turn the common pastime of constructing paper airplanes into a lesson on the physics of aerodynamics and flight with this fun science activity.

The goal of this science fair experiment is to demonstrate the effects of air pressure on objects and analyze applications of air pressure principles.

This science fair project teaches you about what makes persimmons so tart and how astringency can be removed by studying the effect of tannins on fruit.

In this cool physics experiment, use double plane mirrors at various angles to learn about light reflection. Then, see if you can solve a puzzling problem!

In this simple science project, learn about what causes dew and what affects dew formation with a drinking glass, ice, and a soda bottle.

Would your dog prefer homemade or store-bought food? Raw or cooked? Test your dog's preferred diet in this fun experiment.

This fun science project helps to investigate how much water can a plant take up and release in a certain period of time through the process of transpiration.

How do series and parallel circuits work, and which produces the brightest light in a light bulb? Construct both in this project and find out!

In this science fair project, we learn how air molecules move as a result of density, convection, and air currents.

This science fair project idea measures out the sugar of various foods and find out whether people can correctly determine how much sugar is in common foods.

This science fair project focuses on the use of a conductivity device that will determine if a substance dissolved in water can or cannot conduct electricity.

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

Help your child get a grasp on what it was like to build gigantic ancient structures with this easy engineering activity about science and physics.

Learn the basic structure of a DNA strand, which is the double helix, how genes form together, and the resemblance DNA has to a twisted ladder. Create a model.

In this science fair project, kids start a chemical reaction that will make a balloon inflate itself!

This science fair project idea explores whether factors such as temperature and concentration affect the pH of a solution.

This science project allows students to study the psychology of happiness.

How well can people recall what they have observed. Test your knowledge in this fun experiment.

This cool and easy elementary school science fair project idea provides the basic information on the use of our senses to experience the world about us.

Check out this cool science project idea to learn about rocks and explore the cycles of formation, breakdown, and reformation of rocks in the Earth's crust.

Science fair project that determines whether lettuce that is harvested gradually yields more produce than lettuce that is harvested all at once.

Science fair project that examines condensation and the conditions needed in order for dew to form.

Learn about where colors come from and how light absorption works in this fun experiment! All you need is a flashlight, construction paper, and cellophane!

In this science fair project, students examine under what conditions individual plants release seeds and how far the seeds are released.

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

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.

The objective of this science fair project idea is to examine light refraction as it passes through liquid crystals.

In this fun activity, your child will create their very own solar oven to bake s'mores!

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

Is cleaning with lemon effective? Get ready to give this science project some elbow grease and find out if acidic lemons can be used as a cleaning agent.