I cut in half about 20 cardboard rolls, the 3" dia x 3.5" long kind found in those large bum-wad dispensers found in institutional washrooms. My wife will hand them out at a her talk on Sunday about making instruments. These rolls will form part of a drum. I also put holes in and mashed flat dozens of beer bottle caps. I believe these will be for tambourine or noise-maker like instruments. Seeing the huge bag of assorted cardboard tubes I guess a lot of bums were wiped and hands were dried for the musical cause. Decorated drums will look and sound much better.