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Science Fair Project Idea
Have you ever wondered how a radio can grab signals that are transmitted through the air and convert them into sound? In this science project, you will build your own AM radio receiver from scratch and use it to listen to AM radio broadcasts. With your crystal radio you will be able to experiment with the circuit and the antenna to get the best reception. Read more
Elec_p014
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Time Required Average (6-10 days)
Prerequisites To do this science project, you must live in an area where you can receive at least one strong AM radio station. You can check for this with a car or portable radio.
Material Availability Specific circuit items are required. A Science Buddies kit is available for your convenience. See the Materials and Equipment list for details
Cost Average ($40 - $80)
Safety Never operate your crystal radio during a thunderstorm. When not in use, always disconnect your antenna from the radio circuit, and connect it directly to the ground rod. Be sure to wear safety goggles when installing the ground rod, especially if you are using a metal hammer. An adult's help might be necessary for some steps in the Procedure.
Science Fair Project Idea
Have you ever thought about how fortunate you are to have safe and clean water coming out of your faucet? Many people in undeveloped nations don't have this luxury. But does that mean they can't have clean water at all? Is there an inexpensive way they could use to make their own clean water? In this microbiology science fair project, you will investigate whether or not sunlight can disinfect contaminated water. Read more
MicroBio_p025
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Time Required Long (2-4 weeks)
Prerequisites You should have access to a local stream or creek.
Material Availability Specialty items are required. You will need to purchase tryptic soy agar plates, droppers, and glass rods for streaking. See the Materials and Equipment section, below, for more details.
Cost Average ($50 - $100)
Safety This science fair project deals with potentially dangerous pathogens. Wear gloves when conducting the experiment. Read and follow the instructions in the . Do not drink any of the water that results from the SODIS process. See the Experimental Procedure for more information. You should always exercise caution when obtaining a water sample from a creek or a stream.
Science Fair Project Idea
Did you know that your body needs a certain amount of iron in order to stay healthy? Iron can be found in much of what you consume each day. Almond flour—frequently used in cookies—is just one example of an iron-rich food. However, only a small fraction of the iron in food gets absorbed by the body, partially because the body can only absorb dissolved iron. In this project, you will study whether the acidic environment in your stomach helps dissolve iron. You will use a color-based… Read more
HumBio_p043
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Time Required Average (6-10 days)
Prerequisites None
Material Availability This science project requires an iron test kit, available from . The Time Required estimate includes time for obtaining materials. Actual experimental time is only a few hours.
Cost Average ($40 - $80)
Safety The chemicals in the test kit could cause irritation if not handled properly. Be sure to wear gloves, safety goggles, and work in a well-ventilated area. Adult supervision is recommended. The small amount of sulfites contained in the iron indicator tablets may cause an allergic reaction in people who have asthma.
Science Fair Project Idea
The banjo's roots trace all the way over to Africa. The unique sound that a banjo makes depends, in part, on the resonator. The purpose of the resonator is to amplify and project the sound that is made by strumming and plucking the strings. In this music science fair project, you will experiment with a resonator on a banjo and see if you can hear the difference in sound. Read more
Music_p029
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Time Required Average (6-10 days)
Prerequisites You must have access to a computer with a microphone, a spreadsheet program,and an Internet connection. You need to have a basic proficiency with and be able to graph data in the spreadsheet program. If you need help, consult a help guide online or find an adult who is familiar with the spreadsheet program you are using.
Material Availability Readily available
Cost Low ($20 - $50)
Safety Minor injury is possible. Always wear safety goggles and use caution when using tools. Adult supervision is required.
Science Fair Project Idea
In this science project, you will build what might be the world's simplest motor. It has just four basic parts: magnets, a battery, a screwdriver, and a short piece of wire. It takes only minutes to assemble, but it provides a wonderful device to explore how electricity and magnetism combine to produce a fast-spinning motor. Read more
Elec_p065
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Time Required Average (6-10 days)
Prerequisites Some familiarity with basic electronics and physics would be helpful, but is not required.
Material Availability Specialty items are required. See the Materials and Equipment list for details.
Cost Average ($50 - $100)
Safety Minor injury is possible. Wear safety goggles at all times. Be sure to read the important safety notes at the beginning of the Experimental Procedure before you begin.
Science Fair Project Idea
If you want to get your friend's attention at a crowded sporting event with lots of people cheering, you need to shout. If you're trying to do the same thing in a quiet library, a whisper works. The detection limit for each of our senses depends on the amount of "background" stimulation that is already present. This project uses an LED control circuit to investigate detection of changes in light levels. Read more
Elec_p039
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Time Required Short (2-5 days)
Prerequisites Understanding of Ohm's Law and an understanding of logarithms. Note: the biggest expense is a powered, solderless breadboard, which can be used for future explorations in electronics.
Material Availability Specialty items
Cost Very High (over $150)
Safety No issues
Science Fair Project Idea
Dimmer switches let us control the brightness of a light, anywhere from completely off to full brightness. This can be nice when you want to set the brightness "just right," as opposed to a regular light switch that only lets you turn a light on or off. It turns out that you can make a dimmer switch out of an everyday object—a pencil! Try this project to find out how a dimmer switch can control the brightness of a light. Read more
Elec_p056
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Time Required Average (6-10 days)
Prerequisites None
Material Availability For your convenience a kit for this project is available at the . Estimated project time includes time for shipping the kit.
Cost Low ($20 - $50)
Safety Short circuits can get very hot and present a burn hazard. Never connect the positive and negative ends (red and black wires) of the battery pack directly to each other. Adult supervision is required for whittling the pencil.
Science Fair Project Idea
If you live in an area where earthquakes happen, you might be especially interested in this science project. You will learn how to build your own seismograph and how to use it to detect ground motion. Read more
Geo_p017
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Time Required Long (2-4 weeks)
Prerequisites You will need access to some basic wood shop tools and experience using them for this science project.
Material Availability Readily available
Cost Low ($20 - $50)
Safety Adult supervision is required when using power tools and taking measurements outdoors near traffic.
Science Fair Project Idea
The enormous task of cleaning up oil spills in oceans and seas has burdened industry, government, and environmentalists for decades. The cleanup is almost always difficult. It involves great amounts of time, resources, and money to remove the oil from the water, and the cleanup is often only partially successful. Today, however, scientists are coming to the rescue, developing a new technique that combines nanotechnology and magnetism. In this science project, you will test the proposed… Read more
EnvEng_p036
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Time Required Average (6-10 days)
Prerequisites None
Material Availability A kit containing the specialty items needed for this science project is available from the .
Cost Average ($50 - $100)
Safety Neodymium magnets are very strong. Some have the capacity to interfere or reset pacemakers. Never put a neodymium magnet in your mouth. Always keep them away from computers, credit cards, and other magnetized objects.

Ferrofluids create stains on skin and other materials, so take appropriate measures to keep the fluid contained to the working area.

Science Fair Project Idea
Here is a riddle for you: name an instrument that you play with your hands but never actually touch. Have you guessed the answer? It is a theremin! This unusual instrument makes sound without anyone touching it. How does a theremin work? It has an antenna that can detect the player's hand nearby, and as they move their hand around the theremin, the sound it makes changes based on the hand's position. In this music science project, you will get to use your own mini theremin to investigate… Read more
Music_p035
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Time Required Average (6-10 days)
Prerequisites None
Material Availability The Theremin Mini Kit for this science project needs to be specially ordered. See the Materials and Equipment list for details.
Cost Average ($40 - $80)
Safety No issues
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