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.

Using an empty tennis ball can and a swimming pool, you will determine if it's possible to have a conversation under water.

This project explores whether nails, toothpicks, straws, or pen nibs are best for applying ink to paper.

Has your child ever asked you how a submarine works? Here's a simple bathtub project that will make for a hands-on answer.

Help your child understand the scientific concept of evaporation with this fun outdoor science activity.

Encourage a group of third graders to play this fun game of Whistle Hide-and-Seek as a warm-up to get them prepared for finding a "lost" camper.

Your third grader will delight in learning about sound waves as he observes the different sounds created by tapping on glasses with varying amounts of water.

This science fair project idea provides evidence that air is everywhere and takes up space.

Science fair project that examines what causes thunder and why a thunderclap sounds so loud. How is lightening related to the creation of sound waves?

Let your fabulous crafter use their favorite flowers, fruits and herbs to whip up a delicious perfume that they can proudly present to a friend or a loved one.

Give your child an introduction to food preservation by making and canning your own yummy, homemade pasta sauce!

This science fair project idea studies which kind of rock (sedimentary, igneous, or metamorphic) is most damaged by frozen water.

Science fair project that examines how winter storms form and the relationship between temperature, moisture and snow.

The goal of this science fair project is to discover the science behind carbonated soft drinks and apply this knowledge to create a new one.

What happens when eyes see something that the brain knows cannot be true? In this science activity, the brain has to "fudge" it when interpreting what you see.

In this science experiment, your child will test the strength of hollow structures in order to understand how strong bird bones really are.

Study the life cycle of the common blowfly as it relates to forensic investigation. Record the first time you see flies, maggots, and eggs.

examine how passive solar heating works, measure temperature in a parked car on a sunny day. ways to use passive solar heating as an alternative, energy

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.

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

Get this cool science fair idea to explore how arctic tundra animals change their behavior and adapt to survive in long, cold winters.

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

Want to help make studying the nervous system a little more fun? This thinking cap is a great way to learn external human brain anatomy.

Science fair project that teaches you about chemical indicators and how to make your own in order to identify various mystery solutions.