stamping on glass windows???

[picklepuss]

HI! Does anyone have any suggestions about what to use to stamp on windows in your house? The only catch.. we want it to wash off eventually! I know stazon is not a good choice... would the classic or craft inks wash off after being on there for a few months? What would you clean it off with? Thanks!

p.s.:I seem to post stuff in the wrong categories, if I posted this in the wrong spot.. sorry!

[MommmyOfTwins]

I'd like to here peoples experiances with this also?