ISEN-ASTC-L is a service of the Association of Science-Technology Centers
Incorporated, a worldwide network of science museums and related institutions.
*****************************************************************************
My all-time favorite mechanism for a reveal is a Pepper's Ghost.
http://en.wikipedia.org/wiki/Pepper's_ghost
It is most effective at contrasting two states (high tide vs. low tide,
forest in summer vs. winter, even girl vs. gorilla at a carnival) rather
than a word and an image, but the transition between states is magical.
Another option would be to use a lenticular image (most likely to be
familiar as an old Cracker Jack's prize):
http://en.wikipedia.org/wiki/Lenticular
Katherine Ziff
Exhibit Developer
Great Lakes Science Center
***********************************************************************
More information about the Informal Science Education Network and the
Association of Science-Technology Centers may be found at http://www.astc.org.
To remove your e-mail address from the ISEN-ASTC-L list, send the
message SIGNOFF ISEN-ASTC-L in the BODY of a message to
[log in to unmask]