What chromosome combinations determine a fetus gender? Use probability to think about whether a sperm and ovum will create a male or female in this project.

What's the relationship between temperature, air humidity and static electricity? Kids will find out with this free static electricity science fair project.

Collect meteorite dust with a magnet in your very own backyard! The objective of this science fair project is to gather meteorite dust to study outer space.

Learn whether Mylar Balloons last longer than Latex Balloons or vice versa.

Discover whether a metal will expand under hot water.

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

In this science fair project, students examine under what conditions individual plants release seeds and how far the seeds are released.

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

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

This science fair project teaches students about wilting and browning of salad greens.

This science fair project idea explores the different properties & interactions of sugar molecules.

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 simple science project, learn about what causes dew and what affects dew formation with a drinking glass, ice, and a soda bottle.

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

This science fair project idea explores whether the process used to dry the beans we eat for food renders them unviable.

This science fair project idea determines what household items are good conductors of electricity.

This science project encourages students to investigate the Mozart Effect, the idea that classical music promotes learning.

Does dough rise faster with unbleached or bleached flour? Investigate in this science fair project idea.

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

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

Would it hurt to skip brushing your teeth just this once? Let's find out by seeing which foods produce the most mouth bacteria.

What is elasticity? Students will investigate how this concept applies to bouncing ball physics by testing the bounces of balls made out of different materials.

Prove that the Earth is not flat. The objective of this science fair project is to measure the angle of the sun and calculate the circumference of the Earth.

This science fair project idea investigates if heat from direct sunlight is hotter than heat from reflected sunlight.

How does rust form? Kids will learn about the roles oxygen, water, and electrons play in rust chemistry in this cool science fair project idea.

In this pinto bean germination experiment, you'll learn about how fertilizer aids in growing pinto beans into seedlings.

This science fair project idea explores plant growth from a bulb, root, and a stem and investigates asexual plant reproduction.

Do you love to make Jell-O? Find out in this science fair project idea if it is possible to make Jell-O with just warm water.

What do ants eat? Kids find out by observing a colony of ants in this cool zoology science fair project for 4th grade.

Would your dog prefer homemade or store-bought food? Raw or cooked? Test your dog's preferred diet in this fun experiment.