This science fair project teaches kids experimental design and how to test if subjects can really sense if they are being watched.

This science experiment tests why guacamole goes brown and if leaving the pit in will stop guacamole from turning brown.

4th graders construct an ocean food web to learn about consumers and trophic levels, food webs, and food chains in this cool ecology science fair project.

This science fair project idea creates a sedimentary rock and to investigate what takes place during the rock cycle.

This project compares the national anthems of several different countries to determine if there is a correlation between tempo and a country's latitude.

Check out this hot project idea to culture bacteria and determine if the claims about the anti-bacterial properties of curry and cinnamon are true.

Do plants get crowded? Have your curious kid investigate how plants respond if they're forced to grow together in a confined space.

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.

In this science fair project, we learn how air molecules move as a result of density, convection, and air currents.

What is a wedge? Kids find out by experimenting with different wedges in this simple science fair project idea.

In this science fair experiment, students learn about the scientific principles behind Doppler ultrasound.

In this experiment you will use plastic and magnets to test your local soil composition.

Before you get ready for a delicious scramble or omelet, add a bit of science to your morning routine!

This science fair project investigates why the number of visible stars changes from place to place.

This science fair project idea explores if the length of the string that an object is suspended on has an effect on how fast or slow it swings.

Demonstrate which cooking method gets rid of the most fat.

Demonstrate how static electricity can cause an object to move. It also examines just how an object affected by static electricity will move.

Test whether cutting up meats will make it cook faster than just cooking it whole.

Study how we perceive color by exploring optical illusions such as pointillism, digital images, and Ishihara tests.

Examine how a battery can be made from everyday materials.

Can a toy car determine the strength of a magnet? In this cool magnet science fair project, young scientists will learn how to measure the strength of a magnet.

Kids will learn about the interaction of lactose and lactase in milk and discover why we describe enzymes as catalysts in this fun science fair project.

Place mushroom caps on poster board, label samples. Check beneath mushroom caps for "prints" of spores. Record and interpret prints left behind.

Wind is an important source of renewable, green energy. The purpose of this science fair project is to build and operate a windmill generator.

What's the best way to make DIY compost? Kids will learn about aerobic and anaerobic decomposition while learning to appreciate the value of composting.

What is biodiversity? Kids will study different areas of their backyards to see which is the most diverse to learn about biodiversity and random sampling.

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.

What is a series circuit and how does it work? Learn about voltage, electrical current, and resistors in this cool science experiment!

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

Did you know your body is full of simple machines? This project looks at one of the third-class levers in the human body: your arm!