Halloween Science Experiments & Ideas!


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Did you know that tonic water will glow under a blacklight? We didn’t either. The quinine in the tonic water glows a very cool looking blue color that we really like. If you’re not crazy about the taste of tonic water, try making ice cubes using the tonic water and then add them to a glass of Sprite or another light colored citrus drink. Switch on the blacklight and you have the perfect Halloween beverage. After a few minutes the entire drink will start to glow. (see photo) It works for making glowing Jello as well.



Slime and Halloween go together like, well, slime and Halloween. Here’s 2 ways to add a little slime to your October.

DO IT YOURSELF SLIME - If you’ve got a little glue and some powdered borax, you can mix up some slime by following the instructions HERE.

READY TO GO SLIME KITS - If you want to make LOTS of classic slime as an activity for a party or science lesson, or if you have trouble finding Borax, a kit is the way to go. You can find some great slime making kits by clicking HERE.


Ghost Bubbles are regular soap bubbles filled with dry ice mist. If you know the secret you can even hold them in your hand without them popping. Find out how to make Ghost Bubbles by clicking HERE.

EERIE GREEN PUMPKINS green_glow_pumpkin

All your neighbors will have Jack-O-Lanterns that glow orange, but you will impress them with a Jack-O-Lantern that glows green! Best of all, the green glow is simple and safer than traditional candles. Purchase one or two large glowing light-sticks per pumpkin at a party store or hardware store.(We like green, but there are many colors to experiment with) Activate the light stick and simply drop them into the pumpkin, or, to conceal the glow sticks, attach them to the inside of the pumpkin lid by unbending large paperclips to secure them. Place your pumpkin outside on Halloween night and admire the “Oooos” and “Ahhhhs” of Trick-Or-Treaters.


If you think haunted houses are scary, wait until to hear…haunted drinkware! First, check out our Chicken In A Cup experiment, but instead of pulling along the string in short bursts to sound like a chicken (it really does, trust us) pull in one continuous motion. The result is an eerie screaming cup! The only thing better than than trying the screaming cup yourself, is trying the screaming cup with LOTS of your friends all at once. Parents especially seem to enjoy that. The instructions can be found HERE.


Every mad scientist needs some bubbling potions. While dry ice may be the ultimate bubbling potion, the effect tends to be short-lived, and dry ice can be dangerous around younger Halloween party goers. The solution is a simple aquarium pump. Purchase an inexpensive aquarium pump and some tubing at your local pet store along with a line splitter (if you want more than one bubbling potion.) Set up the pump to send bubbles into various large food jars through the tubes. Add some food coloring, plastic bugs or fake body parts, and you’ve got the sights and sounds of a mad scientists lab that will last all night. For added drama, light up the jars from below using flashlights. You can also create floating eyeballs by drawing an iris and pupil onto ping-pong balls with permanent markers. Make a few that will float around by drilling two very small holes in the ping-pong balls and allowing them to fill with water until they sink. For an added glowing black light effect add our Glow-Bright Concentrate.


If you have got some dry ice around this Halloween, gather your friends and family and try making a Dry Ice Bubble Sphere. It’s easy, and the result will wow anyone at your party. Get all the instructions HERE.


Make a paper ghost seem to rise at your command an even dance around

static ghost CLICK HERE for instructions to make a static powered dancing ghost.


If you have some dry ice from the Ghost Bubble Sphere left over, you might want to try this fun little demonstration. Dry ice is the solid form of carbon dioxide. As it sublimates, (turns back into a gas) the carbon dioxide gas escapes around the quarter causing the quarter to vibrate and make a rather spooky shrill along with occasional humorous sounds. Always wear gloves when performing this demonstration.


Here’s some Halloween Fun you should NOT try at home, but it’s still fun to watch!





36 Responses to “Halloween Science Experiments & Ideas!”
  1. brianna says:

    the scicence experiments are soooooo cool i have to try them

  2. awsumGRL♥ says:

    These are really funny! i’m deffenatly trying them this year. thanks for the ideas

  3. sciencegrl98 says:

    Wow I tried the slime one it is so much fun!

  4. ali says:

    i love these ideas thanks sciencebob i will try these this year

  5. i_luv_meh_lol says:

    SCIENCEBOB ROXXX!!! 4 now on i thnk i`ll come 2 ths website mor often!! thrs no other science websites better thn SCIENCEBOB!!!!!!LOL!!! wat do think???
    P.S. I LUV IT!!!!!!

  6. i_luv_meh_lol says:

    ive heard of this site and i actually love it!!! plus its soooooooooo KOOL!!!

  7. zeena-science says:

    Hello, I want to make some slime for my class oh Halloween but I want something that is easy to make and the ingrediants are easy to find! I am in 5th grade! Please answer me! THANK YOU! SCIENCE ROCKS!

  8. ScienceBob says:

    Click on the link in the post for easy instructions to make slime at home. Have fun!

  9. beccky says:


  10. baby gurl says:

    lol that’s cool!!!!!!!

  11. Lyntoniafitch says:

    i need a great science project

  12. blah?blah?blah? says:

    these ideas r so cool i think the ghost and pumkin and the screamin’ cup,i tried ‘em and they really work!!!!

  13. sither says:


  14. ravi science says:

    really like the one with the ghost,needed an experiment pertaining to halloween on short notice so thanks a million.Good job with all the other experiments,they are fun and educational at the same time.

  15. martin-in-TENNESSE says:

    u guys rock but it looks aweful hard 2 do the ghost bubble experiment.

  16. cute stuff says:

    this is awsome stuff it help me a lot when i dont no what science project to do u no what science bob rock

  17. sciencerulesmysocks says:

    science rules

  18. 1027027 says:

    how come you won`t show us the instruction`s for the screaming qurtar

  19. ambien buy daily feb statistics says:

    The best site!

  20. artrockz says:

    good science fair projects

  21. [Nanny bbY !-] says:

    I tried thee.jack-o lanterr.onee that was sooo !much fun nd it was qood workk nd broquht tewqetha my familie nd we hadd bunches of fun!

  22. [Nanny bbY !-] says:

    Mann.That Look oSo Funn Thoe!

  23. Mya***.! says:

    Mann.This stuf Sound o2 Kool i wish That i Made This Up!

  24. Jamya says:

    Loue Yuh

  25. yukta says:

    i love science experiments

  26. yukta says:

    wow! science experiments

  27. Doctorslime says:

    Nice of you to share those are just what the doctor ordered for Halloween.

    Post when your TV appearance Air date, when it gets finalized, I had to wait six months for my air date on Time Warp, so hopefully you won’t have to wait so long. Can’t wait to watch!


  28. Professer Haddon says:

    This is to cool, and I finally found dry ice at the 6th store i went to!

  29. Geek girl says:

    Science bob is awesome got a A+ in science ROCK ON!!!!!!!!!!!!! :)

  30. fluffy says:

    that video about the exploding pumpkins was realy cool WOO-HOO!!!!!!!

  31. Kt321035 says:

    THIS IS AWSOME I GOTTA DO THIS I made the chicken in a cup easy straw instrument and the lava lamp it was AWSOME


Check out what others are saying about this post...
  1. […] can’t go wrong with these fun Halloween Science experiments. addthis_url = […]

  2. […] Thanks for these links, Larry. There are some Halloween Science Ideas that teachers might enjoy at: http://www.sciencebob.com/blog/?p=360 […]

  3. […] Halloween Science at Science Bob’s Site- even more videos and projects. […]

  4. […] Halloween Science Experiments & Ideas! : Science Bob’s Science …Sep 26, 2009 … blog_hallow_banner. Need ideas for your Halloween party, or just some all- around Halloween fun? Here’s a few great ideas to get you started. […]

  5. […] to conduct Halloween-inspired science experiments at school or at home. Check out these ideas from Science Bob’s Blog and then gather the materials to make your slime or bubbling […]

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