Designer Kelly Angood created this cardboard pinhole camera that looks exactly like a Hasselblad medium format camera. The design is screen printed onto the cardboard, and the camera accepts 120 film. See sample photographs shot with this camera over on Angood’s website.
Update: Angood published a PDF with templates and instructions for those of you who want to make your own.
Update: It appears that Angood’s website and hosted materials are no longer available online.