In this cool science fair project idea, kids conduct the ruler drop test on volunteers to determine whether reaction time can be improved with practice.

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

The objective of this science project was to build a model of a volcano and observe reaction between different substances, including baking soda and vinegar.

Learn how to make an anemometer with step-by-step instructions in this cool science fair project idea for 4th grade.

How powerful is the reaction between baking soda and vinegar? Find out here!

Observe how your brain works while it is focused on one thing, and how it works while you are distracted by another thing.

This science project has students collect wood samples and invent new uses for different types of wood based on its properties.

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.

Science fair project that compares the ecology of different soil samples by identifying which sample has the most invertebrates living in it.

Science fair project that examines how to grow bacteria in a controlled setting, using simple materials from around the home.

Kids build a desert food chain, desert food web, and desert food pyramid in this cool science fair project to learn about trophic levels and consumers.

This science fair project idea builds models of various types of bridges and then determines which bridge design is the strongest.

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

Brine shrimp usually live in saltwater. Investigate how salt concentration (salinity) affects the rate at which brine shrimp eggs hatch.

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.

The objective of this science fair project is to experiment with balancing everyday objects and observing the the effects of gravity on materials.

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

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

Spiders don't go to grocery stores or fast food chains to get their food -- they set up traps and wait for their food to come to them!

This project determines the age of a tree using a growth factor chart instead of cutting the tree down to count the rings in its base.

Kids will discover the meat science behind the meat they eat, and find out how to use safe chemistry to make meat more tender.

Kids learn about potential energy, and mechanical energy, and how to make power from water with one of our favorite renewable energy projects for kids.

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

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?

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

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

Science fair project that demonstrates the effect of detergent pollution on fresh water birds' ability to stay afloat.

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.