PlayMom
Invisible lemon ink
Your child writes a secret message in lemon juice, then you reveal it with a warm iron, and the letters appear in brown.
Steps
- Your child dips a swab in the juice and writes a secret message on paper: a name, a word or a drawing.
3 more steps in the PlayMom app
2 games free, then by subscription with a trial period
Open in the appWhat you need
- half a lemon
- a saucer
- cotton swabs
- white paper
- a towel
- an iron
Safety
Only you handle the iron; unplug it after and let it cool out of your child’s reach.
Use the swab only on paper, never near eyes, ears or mouth.
If your child is allergic to citrus, use milk instead.