Invisible Ink Experiment
This Invisible Ink Experiment offers a creative and enjoyable way to explore science with your kids, whether you're filling a quiet afternoon or working through a science unit.
Ingredients
- Lemon juice
- Q-tip
- Small bowl
- Blank index card
- Candle or tea light
- Lighter or matches
Instructions
- Gather supplies.
- Squeeze lemon juice into the bowl.
- Write a message with a Q-tip on the card.
- Let it dry completely.
- Carefully heat the card over a candle flame.
- Watch the hidden message appear.
Video
Notes
Adult supervision is required.