Wednesday July 29th /Young (Mad?) Scientist / Invisible Ink
 This is another preschool activity about science.

You need
2 tbsp lemon juice
cotton swabs

1. Put lemon juice in container
2. Soak cotton swabs
3. Draw picture or write words
4. Hold the paper up to a light
-the heat will "reveal" the picture or words by turning the lemon juice brown

Ext: make TOP SECRET notes or TREASURE MAPS

 


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