What do you do with balloons, once they are Helium free, limp and not in the mood to fly in your office anymore?
Retire them to Good Year? Contribute to the size of your local landfill? Or make an artwork on the wall in your office like my coworker did?
I prefer the third option. It is not just creative, but it gives you a good way to deal with unwanted visitors by pointing to the wall and mentioning that there were others who were full of hot air but are silent now. :)

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Издувани балони обично заврше у канти за ђубре, али моја колегиница је била толико срећна што их је добила, да није имала срца да се опрости од тих шарених представника среће, па их је аранжирала на зиду као колаж.
Креативно и интересантно.