I could take TW's idea of shrink wrap one better: make all the kids come in costumes that cover faces and maybe also hands. A bunch of bedsheets repurposed into coverall things, with stuff drawn/painted on them.... How they'd get washed at the end of the day, I don't know. And making sure that kids don't trade them either, hmmm.

>printers
Yeah, things are supposed to get easier over time. For some reason, printers are just as wonky now as they were when I used them all the time for work, back in the '90s. (Computers! They make your life easier . . until they don't.)