Remember: Doing Nice Things for your family is just as good as for strangers. Don't tell them about it- just leave it for them to find. A sweet loving message or a thank you or an encouragement. Any kind word is good. The Art of the Surprise Note .
We can use invisible ink to write each letter of GHOST at each station. Make Invisible Ink To Write and Reveal Secret Messages: Iodine solution reveals invisible ink messages written using corn or potato starch.