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Maria,

Drinks made with tonic water will glow when exposed to black light, but not
just "in the dark" on their own.  I don't know if your event'll be strewn
with black lights, but if it's not, another idea:

Since luminol's not a plausible mixer, the containers might be a great
option.  Several companies sell chemiluminescent cups/shot glasses/stir
sticks/"ice cubes"/straws (see
http://www.glowproducts.com/glow_stick/products_chemical_bar.html for
examples) -- and those could be a great mini-demo on chemiluminescence!

Chemiluminescence is one of my favorite topics EVER -- contact me off-list
for further ideas, if you wish!

Glow on,
Summer
_______________________________
Summer N. Smith
Public Programs Manager
The Science Place, Dallas, TX
214-428-5555 ext. 341
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Visit our website!  http://www.scienceplace.org

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