Science Fair Project Ideas

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15 Best Science Projects - Our Scientists’ Picks

Science Fair Project Idea
There are many different kinds of slime out there. Some slime is runny and liquid-like; other slime is thick and rubbery. Some slime glows in the dark, some is fluffy, and some is even magnetic! What set of properties makes the best slime? What kind of slime would you choose to make if you were selling slime as a toy in your own "slime shop"? In this project, you will experiment with different slime recipes and try to perfect one to make the best slime. Read more
Chem_p110
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Time Required Very Short (≤ 1 day)
Prerequisites None
Material Availability Readily available
Cost Very Low (under $20)
Safety Supervision required for small children. The slime is not edible.
Science Fair Project Idea
Have you ever wondered why apple slices turn brown once you cut them, or why a yellow banana gets dark spots over time? In this project you will find out why this happens, and how you can keep your apple slices looking fresh! Read more
FoodSci_p082
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Time Required Very Short (≤ 1 day)
Prerequisites None
Material Availability Readily available
Cost Very Low (under $20)
Safety Adult supervision required when using knives.
Science Fair Project Idea
Do you really catch more flies with honey than with vinegar? Do an experiment to find out! Watch the video above to learn how to make a simple homemade fly trap using a plastic bottle. Then, experiment to discover which bait attracts the most flies. You can try a variety of liquids, and you can also use solid bait like rotting food or meat, but you will need to add some water so the flies drown. A drop of soap can help break the surface tension of the water, making it easier for the flies to… Read more
Zoo_p065
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Time Required Average (6-10 days)
Science Fair Project Idea
People have a variety of reasons to use heart rate monitors. For example, patients in a hospital might have stationary, bedside equipment monitor their heart rate and alert medical staff in case of an emergency. Somebody going for a run might wear a portable heart rate monitor to keep track of their workout intensity. Heart rate monitors are not all the same—their appearance and function will vary depending on the intended use. In this project you will design, build, and program your own… Read more
Elec_p091
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Time Required Average (6-10 days)
Prerequisites Familiarity with Arduino™ and assembling basic circuits (or a willingness to learn) will be needed for this project.
Material Availability Requires an Arduino and additional circuit parts. See Materials section for details.
Cost Average ($50 - $100)
Safety The device you build in this project can be used as a demonstration/proof of concept for a science or engineering fair. It should not be used to diagnose or treat medical conditions.
Science Fair Project Idea
Night-lights can be found in many homes; you might even have one in your bedroom! Using a night-light is a great way to avoid stubbing your toe on furniture during a midnight trip to the bathroom. In this fun engineering project, you will design and build your own night-light. You will need to build the circuit, but you will also need to think about the physical design of the product. Most people probably do not want an ugly, bare circuit board sitting around their house. Can you make a… Read more
Elec_p090
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Time Required Short (2-5 days)
Science Fair Project Idea
Does green apple juice taste the same as red apple juice? That might seem like a silly question. Food coloring does not have any flavor—so how could it change how something tastes? Find out whether it does in this food science project! Read more
FoodSci_p081
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Time Required Very Short (≤ 1 day)
Prerequisites None
Material Availability Readily available
Cost Very Low (under $20)
Safety No issues
Science Fair Project Idea
Can you catch a bubble with your hands? What if you use another material, like a piece of paper or aluminum foil? Try this science project to find out which materials can catch a bubble without popping it. Read more
MatlSci_p045
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Time Required Very Short (≤ 1 day)
Prerequisites None
Material Availability Readily available
Cost Very Low (under $20)
Safety No issues
Science Fair Project Idea
Have you ever seen a video of a glitter prank package? They usually show an unsuspecting person opening a package or a gift, only to be sprayed by a shower of glitter. Former NASA engineer Mark Rober got tired of thieves stealing packages off his porch, so he decided to build an elaborate decoy glitter package*, as he shows in this video. Mark's device involves a lot of custom software, electronics, and 3D printing, so might seem a little intimidating if you are new to engineering. This video… Read more
Elec_p089
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Time Required Short (2-5 days)
Science Fair Project Idea
Can you build a volleyball machine? It will need one part to launch a ping pong ball over a net and another to return the ball. How many back-and-forth volleys can you get before the ball touches the ground? While the 2019 Fluor Engineering Challenge is over, you can still try this fun project out yourself. Follow the rules and compare your score to top scores from around the world! Looking for this year's challenge? Check out our main Fluor Engineering Challenge page for all the latest… Read more
ApMech_p054
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Time Required Short (2-5 days)
Prerequisites None
Material Availability Readily available
Cost Very Low (under $20)
Safety No issues
Science Fair Project Idea
Why do the planets orbit the sun without flying off into space? Do they move in perfect circles or do their orbits take a different shape? And how could you possibly do a science project about any of this—you can't do an experiment with the planets! However, you can build a model of our solar system that demonstrates the concept of gravity, using balls of different sizes to represent the sun and planets. Watch this video for an excellent introduction to the model: … Read more
Astro_p043
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Time Required Short (2-5 days)
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