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Chemical Cabbages

It's not for supper, but a red cabbage is needed!!


Colour changes show us who Jesus is, and the wrong ways we must avoid, and the right ways we should choose.

Materials You Need:

Several chopped red cabbage leaves.
Saucepan, strainer and a bottle.
Three clear glasses.
Clear Vinegar (an acid).
Baking Soda (Sodium Bicarbonate - an alkali).


  1. Chop or shred the red cabbage leaves and place it in a saucepan with 2 cups of water.
  2. Boil for 15 minutes and then allow the cabbage juice to cool.
  3. Strain the juice into a bottle.  This will be your Indicator solution.
  4. Prepare three clear glasses three quarters filled with tap water, and add respectively - (a) a teaspoon of Baking Soda, (b) two teaspoons of clear Vinegar, and (c) nothing - to the three glasses and label them.
  5. Pour one tablespoonful of Indicator solution into each of the prepared glasses.
  6. Alkalis change the colour of the solution to green, while acids change it to red.  The last glass containing only cabbage juice gives a purple colour.


This humble vegetable yields a juice that show us just who Jesus is, and what love He had for each one of us in dying on the Cross.  This experiment shows colour changes from:
   GREEN - that Jesus grew in wisdom and favour with God and man.
   RED - that He became our Saviour.
   PURPLE - that He is the coming King of Kings!


Psalm 119:11.



What do you think of when you hear the word "Acid"?  Perhaps you picture a bubbling liquid that would dissolve away your skin if you touched it.   While there are some dangerous acids such as Sulphuric Acid, there are also many safe acids that we use daily.  For example, Vinegar and lemon juice are weak acids and have a sour taste.

On the other hand, some substances are Alkali and have a bitter taste so we do not usually drink or eat these.  Baking Soda is an exception and is used in cake baking to cause them to rise into delicious cakes!


It's interesting that God has provided certain indicators in nature to help us determine if a substance contains acid or alkali, since it is not safe to taste every substance.  This humble cabbage vegetable shows us just who Jesus is and what love He has for each one of us in dying on the Cross.

The solution made by boiling Red Cabbage in water, makes an excellent indicator.  Would you like to taste it, it's only cabbage juice!   No?  Oh well, when it is mixed with an acid or base, it turns red or blue-green respectively, due to its chemical make-up.

(Pour equal amounts of Cabbage Solution into each labelled glass and swirl to mix the contents).  Let's observe the changes and line up the glasses according to colour.  We will put the red (acid), then the blue-green (alkali), and lastly the purple (just juice).

The Results:

The Blue-Green colour shows us that Jesus grew in wisdom and favour with God and with man.  The time came when Jesus had to taste how bitter it was to have to die for us, but praise God, to rise again.

The Red colour shows how Jesus was prepared to undergo the acid trial of shedding His blood on the Cross for the forgiveness of our sins.

The Purple colour shows us that Jesus now wears Royal Robes as the soon coming King of Kings!

Our Spiritual Indicator:

God has also given us a spiritual indicator as well, to help us know right from wrong.  This is God's Word.  Psalm 119:11 says:

"I have hidden Your word in my heart that I might not sin against You."

And so we need to read the Bible daily in order to know what God says about sin and things He wants us to do.  The red for "danger" (acid) can remind us of things we should not do, and the green for "go" (alkali) can remind us of things we can and should do.  The purple reminds us that there is a crown waiting for us in Heaven where Jesus will say "Well done, you good and faithful servant" (2 Timothy 4:7-8).

What about you?  Do you spend some time each day reading the Bible and are you allowing it to guide you?  When we hide God's Word in our heart and memorise it, we are equipping ourselves with our "Spiritual Indicator" that keeps us from making mistakes.  It shows us right from wrong and allows us to test our words, actions and attitudes against what God has said in His Word.

I hope that you have a "Spiritual Indicator" and that you are using it!

God bless.

Copyright © Sharon Children's Ministries

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