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Children will learn why and how to compost as they help with the process of filling their compost, turning it, and observing the changes that occur.

Here's a classic celery science experiment that uses celery and food coloring to demonstrate how plants absorb water.

Children will learn all about cause and effect as they experiment with potion-making in this Halloween themed activity.

There are many benefits to bugs and insects. This science project shows how cockroaches, termites, and other critters benefit our planet.

This science experiment tests whether warm or cold water works best in making cut flowers last longer.

In this fun science experiment, kids will determine the best method for ripening avocados and discover the cool chemical reaction that makes this possible.

Science fair project which determines whether the size or the thickness of a piece of paper has an effect on how many times it can be folded in half.

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.

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

Milk is made of water and fat; but how can you separate the two? Find out in this color changing milk experiment.

This science experiment examines the role of fat in food, especially in making bread rise and whipping cream.

In this science and engineering activity, children will explore types of tunnels and their purposes and then design and build a tunnel of their own.

Learning about how plants grow is a building block in the early grades science curriculum. Put a fun twist on this life science concept with these cup monster friends!

This classic children's game-connecting two cups with a string-demonstrates sound's ability to travel through air vs through a solid.

Do you think you can blow down a sand castle with a mighty wind? Find out which material stands up best to erosion in this erosion experiment.

When you cut a flower to put into a vase, it'll eventually wilt, even with water and sunshine. But is there another scientific secret to keeping flowers fresh?

For this science fair project, kids will learn how to make a lemon battery. They can conduct this classic experiment using readily available materials.

Create a soda bottle garden that defies gravity! This hanging terrarium is housed in a soda bottle and perfect for crafty kids with a growing green thumb.

This weather spinner will improve observation skills by encouraging children to examine and track weather details and patterns.

Create a self-portrait from natural materials in this collage craft activity!

This classic children's game demonstrates how sound travels through air vs. through a solid.

This science fair project examines how seeds hitchhike on animals and clothing.

Kids will learn how to make a thermometer to to explore liquid density in this great science fair project. Which liquids are affected by temperature the most?

Kids will make a beautiful rainbow in a jar and learn what enables different types of liquids to remain distinct in separate layers.

In this sound experiment children listen for differences as they tap on a bag of air, a bag of water, and a wooden block held up to their ears.

This project examines whether people's taste perception is influenced by what they see.

How can we describe the relationship of magnetic field strength vs. distance? Kids will find out with this free science fair project idea.

Here's a fun science experiment that's refreshingly tasty too! Turn regular water into a tasty treat perfect for consuming on a hot day.

Get down to the rubber with this science project that tests the effectiveness of different types of erasers.

In this science fair project, kids will be able to see where germs reside on their hands while gaining insight into the benefits of thorough hand washing.