[Nawaid Ladak]

we did one where it was PVC piping connected to 3 cylinders, you could strap it onto your arm, and it was connected to a battery pack and compressor in a backpack. very dangrous, but very cool. it could launch t-shirts one at a time, but we mainly used it for those little stress balls, ie the NI soccer balls that they had during te deminstration in the pits during championships.

also you might want to look into what diffrent sports teams use, i was at the magic game, and they had one built into a trash can, but it launched t-shirts rolled up into bals, with rubber bands.