The Edison Innovation Foundation is sponsoring an Invention Challenge, with entries due June 19. Use any or all of the following to create something new and unique:  a fork, 10 inches of string, a small bar of soap, a corkscrew, a plastic drinking cup, and/or any small, portable kitchen item of your choosing.  Email a drawing or photo of your invention, with a few words of description, to info@thomasedison.org by June 19. Four winners will receive gift cards of $100, $75, $50, and $25.