Curious Mark and Balloon Chemistry

Air in. Air out.
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Key point: Jesus is boss. What he says goes.



Let's play with air pressure.


Instructions for parents:

This is an opportunity for kids to explore learning how to learn.

Concepts such as Observation, Ponder, Imagine, and Hypothesize (Think) are some tools that help to understand the wonderful world around us. 

It is best to prepare the materials beforehand and set up the learning environment. The area should be free from distractions and safety is of utmost importance. 

For the balloon chemistry experiment, all you need are:

  • 2 balloons
  • 2 plastic bottles


  1. Punch a small hole at the bottom end of one plastic bottles (about the diameter of a nail).
  2. Attach the balloons to the mouth of each bottle with the balloon facing inside. 
  3. Allow the kids to try to inflate the balloon in the bottle that doesn't have a hole in it. You'll find that the balloon will not inflate. 
  4. Take the other balloon. The one attached to the bottle with a hole on the bottom.
  5. Inflate the balloon, making sure that the hole is not covered by your finger. 
  6. When the balloon is inflated to its maximum capacity, cover the hole with your finger. This keeps the balloon from deflating. 
  7. See if you can slowly deflate the balloon by gently releasing your finger from the hole.
  8. You can present this demonstration to the kids as a magic trick of sorts. 


Why did this happen?

Air takes up space. This is why it's not possible to inflate the balloon in a bottle without a hole in it—the air already present in the bottle has no where to go.

Conversely, it's easier to inflate the balloon in the bottle with a hole in it because the air present in the bottle can be pushed out of the bottle through the hole.

Removing your finger from covering the hole allows the balloon to deflate. Air returning into the bottle through the hole displaces or pushes out the air in the balloon. Atmospheric pressure is cool, right?


Bible Lesson:

Ephesians 2.10 NLT – For we are God’s masterpiece. He has created us anew in Christ Jesus, so we can do the good things he planned for us long ago.

  • When Jesus speaks, the story changes.
  • What Jesus speaks into your life can change your story.

Read the story of Jesus calming the storm and the sea in Mark 4.35-41

  • The disciples were afraid the storm and raging sea would capsise the boat and cause them to drown.
  • Jesus was calm and sound asleep while everyone around him was worried.
  • It was always the plan to get across the sea to the other side — no matter how turbulent or stormy the journey became.
  • With His word, Jesus calmed the sea and stopped the storm.
  • Through trust in Jesus, God's work is started in our lives.
  • No matter how difficult life becomes, we are guarateed completion of God's work in our lives.
  • This assurance comes from the presence of Jesus in our lives.


Key words:

  • Displacement
  • Pressure
  • Stillness
  • Quietness
  • Completion



  • Tell Jesus that you trust Him with all your heart.
  • Tell Jesus that you trust that He will complete God's perfect work in your life.