Event type: Other (graduation 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: No, Balloon arch: No, Balloon centerpieces: No. Number of guests: 20-40. Age of guests: 4-6 years old, 6-10 years old, 10-14 years old, 14-17 years old, 18 and older.