I wonder-
is there something you could write that reveals naughty words when the sun melts one half?
(
Kamikaze Stoat £4.09,
Sun 6 Apr 2008, 17:00,
archived)
You could write a naughty word in fake snow
and let the sun do its work
(
Plog,
Sun 6 Apr 2008, 17:02,
archived)