The most fun thing I have done for my girlfriend with balloons was to get the biggest box I could find that the post office will mail and I put in a huge bunch of Mylar helium filled balloons.
I taped the ribbons to the bottom of the box…. seal it….. and sent it express mail! The Mylar balloons hold up really well for a least a week….. and she loved it getting a huge box of balloons for her birthday (and not to mention the gold necklace I had tied to the bottom of one of the balloons)!
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