alternate language

what is a good alternate language to learn? i just want something to expand
my mind and hopefully reduce or delay any chance of alzheimer's. i would
especially like to hear from those of you who learned python _before_ these
languages.

haskell, erlang, ocaml, mozart/oz, rebel, etc.

i don't require any of these features, but extra browny points for any of
the following:

interactive interpreter
batteries included
can integrate with c
compiles to native code
can use a gui toolkit such as wx
doesn't take 60 hour weeks over years to master


thanks,

bryan




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