In this project, a model of a submarine is built to simulate the buoyancy and displacement of water and air.

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

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

The goal of this evaporation experiment is to learn about how different external conditions affect drying time.

Does the temperature of a magnet affect its strength? Learn about the relationship between magnets and temperature with this cool physics science fair project.

It's not actually that hard to get energy from garbage! Kids learn how to make biogas in the form of methane with this cool and easy science fair project idea.

In this experiment, the weight of aluminum cans will be compared.

Help your kindergarten science maven explore the water cycle without getting everything wet.

This science fair project idea researches how your choice of clothing affect how hot or cool you feel during the day.

This science fair project idea examines liquids of different densities.

Science fair project about work and energy which uses a simple mathematical formula to predict how far a jar will roll down an incline.

How clean is the air we breathe? The answer might surprise you. Learn how to investigate local air quality with this cool science fair project.

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

Compare animal and plant fats and observe, and record, and draw conclusions about their similarities and differences.

Can you plant the insect-attracting borage plant to increase the amount of beneficial insects in your garden? Find out in this experiment!

Science fair project that determines whether cooling eggs helps them be peeled more easily. Compare the time it took to peel each egg.

Teach your child how butter is created by shaking up cream the old-fashioned way.

What combination of cloth and stain will be the easiest for removing stains? Test and experiment!

Science fair project that examines albedo, and how this information is applied in the design of cars, sportswear, and other items. Which colors reflect light?

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.

Grow potatoes in a plastic bag—easy to grow and harvest, and yummy to eat!

4th graders construct an ocean food web to learn about consumers and trophic levels, food webs, and food chains in this cool ecology science fair project.

This science fair project idea investigates which objects float and sink in honey, water, and oil.

This science fair project idea determines the most effective method of preserving food.

In this science fair project, you'll make a "ghost" appear in a test tube, and learn about what happens when hot water and cold water interact.

Kids will learn about the interaction of lactose and lactase in milk and discover why we describe enzymes as catalysts in this fun science fair project.

Learn about the fruit fly life cycle in this experiment. Capture fruit flies to examine various stages of insect metamorphosis.

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.

Kids learn how to prevent erosion by growing grass. They'll test soil with grass against raw soil in this revealing science fair project idea for 4th grade.

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.