Computer printing on paper bag: convert image to a horizontal image, customize paper dimensions (i. rename the custom print "paper bag". Next time, you'll just have to go to paper size and select "paper bag".
All about me bag - Each child fills the bag with 4 things about them and brings it into school. They can decorate the bag too. I did this with my own items as a first day of school ice breaker. Maybe get large paper sacks from the grocery