Event type: Birthday party. Indoors or outdoors: Outdoors. Balloon art type: Simple balloon twisting (e.g. 1-balloon dog): No, Detailed balloon art (uses several balloons): Yes, Decorative balloon sculpture: Yes, Balloon arch: Yes, Balloon centerpieces: Yes. Number of guests: 20-40. Age of guests: Younger than 4, 6-10 years old, 10-14 years old, 14-17 years old.