[LM_NET] Target: OT Pictures ?

[wflagg <wflagg@WOLVES.K12.MO.US>]

Hi all,
I have a student who wants to know what those pictures are called that  
don't look like pictures until you stare at them for awhile, then all  
the details come into focus, but go out of focus if you try to focus.  
What are they called and are there any on the internet? If anyone  
knows, the student would be very grateful.
Thanks,
Wilma

Wilma Flagg, Librarian
Reeds Spring High School
Reeds Spring, MO
wflagg@wolves.k12.mo.us

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