Here’s how it works: Just like the real Silver Line, the balloon version took a lot more time and resources to construct than anticipated. How many balloons do you think went into this sculpture? Tweet your guess of the number of balloons to @PostLocal with the hashtag #balloonsilverline.
The person with the closest guess tweeted by 10 p.m. Saturday, will win the Balloon Silver Line. In case of a tie, the winner will be selected in a random drawing. The winner will be notified by noon Sunday.
The winner must pick up the balloon sculpture at The Washington Post, 1150 15th Street NW, Washington, D.C., by 5 p.m. Monday, July 28. Click here for full contest rules. Prize subject to minor popping, shrinking and single-tracking.