Fun Halloween Activity for Kids: Self-Inflating Ghost Balloons!

Science Magic: Self-inflating Halloween Ghost

My kids LOVED this fun science-based Halloween activity that we came up with! It’s very simple, too – all you need is a water bottle, balloon, Sharpie pen, vinegar, and baking soda!

Halloween Activity for Kids: Self-inflating Halloween Ghost

Draw a ghost face on the balloon, and fill it with about 1 Tablespoon of baking soda. Fill the water bottle with about half a cup of vinegar. Attach the balloon to the top of the water bottle, lift the balloon so that the baking soda falls into the water bottle, and watch the magic happen!

Fun Halloween Activity for Kids: Inflating Ghost Balloon

The two household chemicals create carbon dioxide when mixed, and this inflates the balloon! This balloon experiment is one that we’ve done before, and it never ceases to amaze my kids!

mesmerized kiddos :)

Here’s a second one, done with a pink balloon for three-year-old Lily. The pink-ness makes it a particularly friendly ghost, I think. :)

Halloween Science - fun activity for kids

Emma used our small camera to capture the entire thing on video:

Halloween science for kids

Which we’ve uploaded to Youtube! Enjoy!


Here are some more fun twists on this activity:

Do you have a favorite science experiment? Or a favorite Halloween activity or craft?

A hands-on science and math resource for parents and educators


  1. Two Chicks and a Hen says

    We’ve done this experiment, but not in a long time, and *certainly* not as a ghost. My kids are going to love this!

  2. says

    Awesome idea! It’s been a year since we did this experiment (non-ghosty), so it’ll be fun to see J’s excitement for the experiment again and have something new, Halloween related (that’s not messy or sugary). I might steal the idea for a Halloween post. I’ll link back up to you, for sure.

  3. says

    Clever idea mama! I’m featuring it this week on Tuesday Tots so if you collect featured buttons, you’re welcome to grab one of mine. Thanks so much for linking it up :D


  1. […] 3. Magically Inflating Ghosts – let your kids have Halloween fun and learn a little science into the bargain with this activity from Mama Smiles. […]

  2. […] Un esperimento scientifico che lascia sempre tutti a bocca aperta, serve una bottiglia di plastica in cui avrete versato un bicchiere di aceto, e un palloncino, su cui avrete disegnato bocca e occhi, riempito on un cucchiaio di bicarbonato di sodio. Il palloncino va posizionato sul colla della bottiglia e alzato per far ricadere il bicarbonato nell’aceto. La chimica farà il resto.  Visto su MamaSmiles. […]

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