Balloons make wonderful photographic subjects, bright and colorful shapes against a clear sky. The town of Sequim, on the Olympic Peninsula of Washington State hosted a 2 day event some time ago and I attended their Night Glow event.
There was a display of antique cars, live music, and of course the balloons. The event was held in a field where they had carefully laid down a thick sheet of plastic and covered it with water to create a reflective pond specifically for the night glow event.
The water ran off, leaving the plastic exposed, but the results at night were stunning!
These images are for sale as canvas wraps (You can get them with floating frames, very cool!) as well as fine art prints. Here is the link.