Science for Toddler: Magic Ink (Spy Version)

The Making of Invisible Ink~

Invisible ink has fascinated toddler for generations *yay*

You might think that it would be difficult to make, but it’s not 😉


Note: This simple experiment is great for young toddler, but must be conducted with adult supervision because it involves using the kitchen stove or candle.


Materials You’ll Need:

  • some vinegar (you also can try this experiment with other liquids, such as orange juice, lemon juice, apple juice, onion juice and milk)
  • some white paper
  • a clean paintbrush (clean cotton swab or a toothpick)
  • kitchen stove (or candle)

Step by step guide

  • Step 1: Mission In Action
    Ask your toddler to pretend that they’re a spy on a secret mission, writing messages that would lead to big, big trouble if they were discovered.
    Make them choose their words carefully.
    *for this mission, I asked my kiddies to write their secret message to PaPa*

    KiruaMi-cHan tha Spy Writer~

    ReiHi-cHan tha Spy Writer~

  • Step 2: Start It On!
    Guide your toddler to use the brush or cotton swab and write their message with vinegar on the paper.
    Don’t use a lot of vinegar and soak the paper. Use just enough to make a thin coating.
  • Step 3: Finish Line
    After finished writing, ask the person whom is a special agent *in our case, Papa is the one!* to receive the paper and help them to turn on the kitchen stove to a low heat.
    Very carefully hold the paper about a foot above the warm burner.
    If you don’t see results, you may have to make the burner a little hotter.
    Do not, however, hold the paper low over the burner.

    Papa tha Special Agent~

Result: As the paper heats up, your toddler’s message will become brown and they’ll be able to see what was written.




You want to know why? (explain to your toddler):

Lemon juice and vinegar are mildly acidic, and acid weakens paper. The acid remains in the paper even after the juice or vinegar dries.
When the paper is held near a hot light bulb the treated portions of the paper burn, and turn brown, more readily than the untreated portions.


Have fun mommies!

Just be sure to follow all safety rules 😉

*gambatte ne*

May all the best to you. Amin~

About MamaFiza

Born in 1984. Family 1st; living in boulevard of peace, loving my treasured family, fully breastfeeding my precious 4 kids (tandem nursing) *30 months duration for each of 'em*, homeschool advocate, book writer, Work-at-Home-Mom (WAHM), certified Lactation Counselor (LC), official ZIN, yoga + pilates enthusiast, no pacifier & no maid rules! [Praise to God]

21. February 2008 by MamaFiza
Categories: My Fun Homeschool | Tags: , , , , | 2 comments

Comments (2)

  1. mamafiza the mastermind,

    I’ll surely use this experiment with my kids. Hmm.. a good reason to use the ‘cuka’ in my kitchen.

    After that, we can play the ‘I Spy’ game… I spy with my beautiful blue eyes (ekekeke) something that begins with the letter ‘s”
    hah teka teka..

  2. lepas2 ni.. I pun nak cuba this experiments!!

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