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Top 100 Science Fair Projects

Updated on January 8, 2015
EdTecher profile image

Heidi Reina, M.S., Ed, is an educational technology integrator and former teacher, reviewing free educational websites and apps.

Image of "What puts the 'pop' in popcorn?" science fair project, courtesy of woodleywonderworks, under Creative Commons 2.0 license.
Image of "What puts the 'pop' in popcorn?" science fair project, courtesy of woodleywonderworks, under Creative Commons 2.0 license. | Source

Free Science Projects for Elementary, Middle and High School

Get a fast start and some great ideas with these 100 science fair projects. Whether you're gearing up for the school's annual science fair or a city-wide or state-wide competition, these projects are an excellent starting point.

They also make wonderful summer projects to keep your kids engaged with science in a fun way. I've recommended many of them to my students. My daughter has done quite a few of them, and won a couple of awards.

The best feature of these projects - they provide detailed instructions.

Also be sure to check out tips from for kids to create a great science fair project.

If you have a link to a good science fair project, please add it in the comments section below.

These suggestions are moderated to ensure that items added are free, high-quality science project instructions. Please note that many of the projects require the purchase of supplies or equipment to accomplish them. So as you help your child select a project, keep in mind the cost and availability of materials.

Image of a local science fair in New York, courtesy of  Stilfehler, under Creative Commons 3.0 license.
Image of a local science fair in New York, courtesy of Stilfehler, under Creative Commons 3.0 license. | Source

What's your favorite science?

Does your kid prefer to do experiments that involve plants and animals? Or skateboard physics? Or computers and statistics? Let's find out what science areas interest our readers most.

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What was your favorite (or most disastrous) science fair project in school?

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    • profile image

      bob 2 years ago

      it was awesome

    • profile image

      googoo 2 years ago

      omg this is awesome

    • profile image

      ScienceLover158 3 years ago

      I don't know how to come up with a prodject can you help me.

    • AnonymousC831 profile image

      AnonymousC831 3 years ago from Kentucky

      I enjoyed your lens.

    • Arachnea profile image

      Tanya Jones 4 years ago from Texas USA

      I confess, I don't have kids. I answered the poll according to my inner child, however. :D I'm glad I found this. I'm writing a book in which several characters do a science fair project and I'm at a loss. Their project will incorporate the strengths of each member of their small group. Thank you.

    • profile image

      cleansweeping 4 years ago

      I love this site!!!!

    • OUTFOXprevention1 profile image

      OUTFOXprevention1 4 years ago

      I used glo germ and it was awesome. We actually sponsor students once in a while who request it for science fairs! Thanks for sharing.

    • profile image

      Suko 5 years ago

      Why didn't I think to look here when my kids needed to come up with science projects?! This lens is FABULOUS; it is a helpful resource to students of science--and their parents!

    • EdTecher profile image

      Heidi Reina 5 years ago from USA

      @anonymous: there are recipes online to use instead of agar, made from gelatin and sugar or yeast. and one inventive 13-year-old came up with the idea to use large bubble wrap instead of petri dishes. cut the tops off the bubbles and pour your agar substitute in a strip of 4 or five bubbles. just be sure to wash everything you use with hot soapy water first including the scissors or knife. as for the bacteria, get yourself a some q-tips and gather sample from your bathroom, kitchen, doorknob... the list of places to find bacteria is endless.

    • profile image

      anonymous 5 years ago

      @anonymous: where did u get the materials? (the petri dishes ,e.coli bacteria...ext..) i coudnt find them except online and i don't have time to get them online

      can u help me plzzzz?!!

    • srsddn lm profile image

      srsddn lm 5 years ago

      Thanks for sharing such a valuable resource. I am sure my son will make use of it.

    • profile image

      anonymous 5 years ago

      the garlic exp. was great!!!!!!!!!!:-)

    • profile image

      anonymous 5 years ago

      Great resource! Thanks :)

    • profile image

      anonymous 5 years ago

      the city water supply. a great model to make

    • profile image

      anonymous 5 years ago

      interesting lens very helpful for my brother

    • profile image

      anonymous 5 years ago

      bridge experiment what a superb.

    • profile image

      anonymous 5 years ago

      What a great challenge and inspiration for scientific minds!

    • bbsoulful2 profile image

      bbsoulful2 5 years ago

      I did a great experiment on micronutrients and sunflower growth. Funny thing is, I think I left it in my locker when I graduated...

    • SheGetsCreative profile image

      Angela F 5 years ago from Seattle, WA

      I can't remember what it was supposed to be - all I remember was HCL and seashells smell really really bad! Awesome lens!

    • waldenthreenet profile image

      waldenthreenet 5 years ago

      congrads on your Squidoo trophy. Am gong for next. Conversations help. Thanks.

    • AlphaChic profile image

      AlphaChic 6 years ago

      The egg drop, definitely :)

    • dwnovacek profile image

      dwnovacek 6 years ago

      Great resource, nicely presented. Angel Blessed!