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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.

What are the effects of fertilizer on plant growth? What's the best fertilizer type (solid, liquid or powder)? Kids find out in this science fair project idea.

In this science fair project, apply the principles of leverage and force by building six simple machines designed to set weights in motion.

Kids will learn some cool stuff about chemical reactions by determining what happens when you mix different concentrations of hydrogen peroxide and yeast.

Hold a magnet marathon! Explore the power of magnets with your kindergartener in this entertaining and simple science game.

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.

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

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

Learn how different types of soil affect how animal tracks form in this experiment!

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

Do you have your isopods straight? Learn about sow bug and pill bug behavior by building a terrarium to study them in!

Ever wondered how a plant drinks water? This science project will teach you how and help you create a beautiful floral display!

The goal of this science fair project is to analyze differences between the taste and texture of frozen and fresh food.

Have you ever noticed the way a dropped stone makes a fun pattern in a pond or lake? What's the science behind these splashy occurrences?

This science fair project idea investigates the difference in reaction times between boys and girls.

People have favorite flavors, but what about ants? Which ant food is the most popular?

This science fair project on testing water hardness is a great introduction to practical chemistry. Test and learn the difference between hard and soft water.

This simple project makes young children aware of their sense of smell and its capacity for providing them with information about their world.

Here's a math, science, and social studies activity: help your kindergartener become a "coin archaeologist" by examining how different coins look and feel.

This science fair project idea explores whether talking to a plant will help it grow.

Find out whether putting something on top of a plant will inhibit its growth.

Explore how sound waves are reflected and absorbed by producing echoes. Analyze which locations produce echoes.

Does skin thickness really decrease fruit spoilage? Find out in this science fair project idea!

These science fair experiments demonstrate the chemistry of rust and the oxidation process.

The purpose of this science fair project is to determine which conditions and materials quicken the composting process to make the best compost.

How would you dry your wet clothes if your dryer didn't work? Find out with this fun experiment!

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.

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.

Discover whether the â5-second ruleâ is effective at determining whether food is still safe to eat after being dropped on the ground.