Here’s a fun site that pops out a PDF for letter writing without envelopes, cutting or glue – “All you need to send one is a printer, an A4 or Letter-sized sheet of paper and a stamp. The letter is the envelope! It holds itself closed, secured by the stamp – so it doesn’t even need any glue. You use the entire sheet of paper, so there’s nothing to cut either!” [via] Link.
Also, see our papercraft collection here.