> 
> I'm asking here, in Spot the Creator, and some other places. Here are two
> very simple models I thought of, that I wouldn't be surprised if someone
> had created before:
> 
> They both include a mechanism in order to reveal a hidden area of the
> paper.

Hi Gerardo,
I haven’t seen either one used as an action model for revealing hidden areas or 
messages before.
Matthew

Reply via email to