Here's some balloons I did for a typical convention booth.
When you have a situation that doesn't allow helium, here's an idea you can use!
A client of mine rented out a booth and wanted it to stand out more, so we put some fun balloons in front and in back of it!
Balloon columns with twists throughout it.
The yellow twisty balloons at the top really made it stand out.
the blue and green balloons were great accents too!