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".
Make your own projector using a shoe box, duct tape, magnifying glass, and your smart phone! That's crazy! A projector would be nice.If I made this and used it during an observation either I could save us a lot of money or get my own projector.