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.

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

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

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

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.

Many ancient cultures used the rising or setting sun to create calendars. Observe the setting sun once a week to come up with your own solar calendar!

Grow potatoes in a plastic bag—easy to grow and harvest, and yummy to eat!

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.

Here's a fun activity that will have your child researching, collecting, and charting plant specimens from the neighborhood.

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.

By using static electricity generated from their body, a child can cause a small fluorescent lamp bulb to light up!

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.

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

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

Science fair project that examines how temperature affects density and how density in turn affects the behavior of helium gas.

Popsicles aren't just for the summertime, this activity takes cold and turns it into a creative and tasty science experiment.

This science fair project idea explores alcoholic fermentation at work by making your own soda.

Show your child how and why the microwave works, while demonstrating just how strangely foods can behave while inside the crazy cooker.

This science fair project idea attempts to train a worm to complete a simple maze in order to find out if worms can learn and remember.