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.

This science project allows students to study the psychology of happiness.

This science fair project compares the allelopathic affects of juglone, a chemical agent produced by the Black Walnut tree, on two plants.

Is it amplitude? Weight? Length of string? Kids will discover what factors changing the period of a pendulum depends on in this fun and easy physics experiment.

In this project children discover, identify, and sort seeds from a variety of fruits and vegetables

Science fair project in which you will start a fire from scratch without using matches or a lighter.

Get ready for a yummy taste test! Just pour the milk -- and make sure you have some chocolate chip cookies on hand.

This science fair project idea examines whether the colors of the spectrum respond differently in the thermal aspect when radiated by the sun.

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

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.

In this science project, young children observe, record, and create collections of colors in their world and increase their powers of observation.

In this science fair projects, students will grow out the bacteria that collect on air conditioner filters.

Can a horse lead itself to the carrot? Train your horse with carrots and boxes and test horse memory in this fun zoology science fair project.

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

This science fair project focuses on a polymer called hydrogel super absorbent crystal which absorbs water, swelling to many times its original size.

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

This science fair project idea explores whether color affects a person's emotional state.

Glass is see-through, but usually you can still see that it is there. In this experiment, we use baby oil to make glass go completely invisible.

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 which examines the relationship between frequency of spider web vibration and spider's response time.

This science fair project idea measures and compares effects of chemical weathering, specifically carbonation, on different kinds of rocks.

The objective of this science fair project is to set up a compost bin to convert food scraps and organic waste.

In this popcorn experiment, students can explore how two things made out of the same material can have very different appearances and densities.

You've heard the expression "burn rubber" but do you know how heat affects rubber? Examine the impact of temperature on rubber in this fun science experiment.

Learn about savanna flora and fauna in this science project! Take a look at characteristics of tropical grassland plants and animals that help them survive.

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

Step into the fantastic world of colors with a project that explores what shade you -- and your friends -- like best.

Can you plant the insect-attracting borage plant to increase the amount of beneficial insects in your garden? Find out in this experiment!

Test your friends to find out if you can replicate the placebo effect's incredible results.

Kids often ask, "how tall am I?" This science fair project seeks to determine how well kids can guess their own heights.