27th of October 2020

Pi's Ghost Story and Experiment

Hello, Scientists!

It’s me, Pi!

It's Halloween time, and what’s a better combination than science tricks and ghost stuff! (Candy and ghost stuff is a close second…)

I want to tell you how I tricked my friends Kelvin, Esther, and Hoseli the Robot. You can try the same story and experiment at home!

We were sitting in a dark room telling ghost stories. I asked my friends if they had ever heard of a sleeping ghost that only wakes up for one terrifying moment every hundred years…

Kelvin and Hoseli looked confused. Esther laughed and shouted, "There are no ghosts!"

"Aren't there?" I asked, and raised the head of a ghost lying on the floor to wake it, "This ghost has been asleep for 100 years and today he is going to wake up!"

Everyone laughed at me, but Esther's smile began to fade away when the ghost began to rise…

Everyone shouted in horror and I cried with laughter. Got ‘em! Mwahahaha…

Supply List

  • Some white fabric (to drape over the jar—this will be your ghost)

  • A pen

  • A small bowl

  • A small jar

  • An elastic / plastic / disposable glove

  • A rubber band

  • 1 tbsp and 1 tsp of baking soda

  • 100 ml / 3.5oz / 5.5 tbsp of vinegar


  1. To get started, mix 1 tsp of baking soda and 1 tbsp of vinegar in the small bowl. Observe closely. Could this be what wakes up the ghost?

  2. Draw your ghost’s face in the middle of the white fabric.

  3. Pour the remaining 4.5 tbsp of vinegar into the jar. 

  4. Take a disposable glove and measure 1 tablespoon of baking soda inside the glove. Hot tip: Tilt the glove so that the baking soda goes into the fingers of the glove — it’ll make the next step a little easier.

  5. Pull the glove over the mouth of the jar but be very careful that no baking soda falls into the jar just yet. 

  6. Attach the glove with the rubber band if needed.

  7. Drape the fabric over the jar, with the ghost’s face centered over the glove. The sleeping ghost is stirring!

  8. To wake up the ghost, you need to shake the glove so that the baking soda falls inside the jar. 

  9. Have fun!

We’d love to see your ghosts! Tag us on social media @kidescience, or use #kidescience. We’re big softies, but if you share something that makes us smile, we might reach out to send something your way…


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