3 - 4 rolls per group we just grabbed a bunch from the dollar store and threw them in a heap and everybody ran back and forth grabbing them as they needed it and its duct tape so we werent too worried about buying to much cause lets face it there is always always a need for duct tape somewhere lolBahahaha! This is the best idea I've ever heard! How much tape did you use per flyer? Like how many rolls of (duct?) tape are we talking here??? :)