How to Write a Love Letter with Invisible Ink

This is the easiest invisible ink recipe with something from your fridge. Write a love letter to your child and let them find out what your secret message is. What would you write?

What you’ll need

  • Milk
  • Chalk
  • Sandpaper
  • Cotton Buds
  • Paper

How to Set Up

  • Dip a cotton bud in milk and write your secret message on a piece of paper. Wait until dry.


*The water in the milk will evaporate, leaving the fat on the paper. The chalk powder sticks to the fat more than the paper, thus revealing the message.

*I used whole milk. Skimmed milk with less fat may not work well.

Adult supervision is required for any activity presented by CHANA and Chanafavors.

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