Explore our library of free science projects for K-12. Browse by subject or grade level to find your winning science project. With over 1,200 science projects in 32 different areas of science from astronomy to zoology, we’ve got something for everyone!
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!
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…
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…
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Average (6-10 days)
Familiarity with Arduino™ and assembling basic circuits (or a willingness to learn) will be needed for this project.
Requires an Arduino and additional circuit parts. See Materials section for details.
Average ($50 - $100)
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.
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…
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!
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.
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 . 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 shows you…
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 page for all the latest information.
Note: are you a…
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:
Do you want to build a solar-powered car? How about enter it in a competition and race it against other people's designs? If so, this is the project for you! These instructions will show you how to get started building a solar-powered car that you can enter in a science or engineering fair. No experience needed.
If you want, you can even compete in the Junior Solar Sprint, a regional competition for solar-powered cars. Get more information about your
Are you a teacher? Try the classroom…
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Short (2-5 days)
Requires solar panel and motor. See Materials list for details.