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This project examines the amount of saltwater required to affect the growth of plants and subsequent effects on growth and development.

In this experiment, you'll make a seafloor spreading model to learn more about how plate tectonics work and create mid-ocean ridges.

How do the phases of the Moon and gravity cause spring tides and neap tides? Does the Sun play a role in the tides? Figure it out in this fun science project!

Want to see a great example of Newton's first law? Kids will learn about basic physics with this fun, ballistic experiment.

This project is about after-images and what possibly affects them.

Learn how to make a hygrometer to measure relative humidity in this project. Make a sling psychrometer hygrometer with gauze, thermometers, and a bottle.

Science fair project idea which teaches you how to make butter by separating cream into butter and buttermilk.

This science fair project examines how tsunamis travel by simulating a tsunami moving around an island. You will generate a pretend tsunami in a swimming pool.

Science fair project that helps you create your own compost pile in order to test the efficiency of different methods of composting.

In this project, all you need is a protractor to learn how to use the altitude of Polaris to find latitude on Earth. Polaris is also known as the North Star.

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

This experiment uses a voice recorder to monitor the progression of a message in the telephone game as it deviates from the original.

This activity is a fun way to "go fishing" with your preschooler, while learning about the concepts of freezing and melting.

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

This science fair project will help learners determine whether algae can be made to grow by feeding it supplementary carbon dioxide.

How does the size of a vibrating surface affect the pitch of a drum? Learn about drum size and pitch with this easy science fair project idea.

Kids will enjoy this cool demonstration of Newton's Third Law and the conservation of linear momentum.

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

This science fair project idea investigates whether plants can survive being frozen.

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.

In this experiment, kids will see if pruning tomato plants makes them more fruitful and learn about the factors that contribute to a plant's fruit production.

Observe corn seed germination to learn about dicots and monocots and how plants grow from seeds to seedlings to full-grown plants!

Try this activity with your child to explore what happens to rain (and the living things that need it) when it becomes polluted.

How do search engines work? What makes various search engines different? This project delves into the world of web crawlers, caching, indexing and algorithms.

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

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.

This science fair project idea investigates how images are influenced by changes in light.

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