1. A planar carrier for a coded card which is substantially aesthetically irreversibly convertible from a substantially two dimensional blank into a three-dimensional card-enclosing gift package, comprising: a. a blank which prior to package conversion is essentially planar, said blank being essentially rigid and laminated with plastic on at least one side and further comprising: i. a first panel of generally rectangular configuration; ii. a pair of foldable flaps connecting to said first panel oppositely one from another along fold lines defining portions of respective longitudinally elongated edges of said first panel, said flaps being adapted to fold towards one another along said fold lines to thereby overlie respective portions of a rear surface of said first panel; iii. a lower panel of generally rectangular configuration connecting to said first panel along a fold line defining juncture therebetween, adapted to fold subsequently to said flaps along said associated juncture-defining fold line upwardly to facingly overlie said rear surface of said first panel and said folded pair of flaps overlying respective parts of said rear surface of said first panel, to define a card receptacle pocket in space between now mutually facing surfaces of said first and lower panels, said lower panel having an aperture therethrough proximate the center of said lower panel; iv. an upper panel portion of generally rectangular configuration connecting to said first panel portion along a fold line defining juncture therebetween, adapted to fold along said associated juncture-defining fold line towards said rear surface of said first panel portion after folding of said lower panel portion into position facing said first panel portion, to overlie a part of said lower panel portion between said aperture and a free edge of said lower panel portion which defined the lower extremity of said blank prior to folding, and including a tab portion positioned along and extending from an upper edge extremity of said upper panel portion, said tab portion being adapted for interfering insertion into said aperture in said lower panel portion after first folding of said lower panel portion into facing relationship with said first panel portion and after second folding of said upper panel portion to overlie said part of said lower panel portion between said aperture and said lower panel portion free edge which had defined a lower extremity of said blank prior to folding to retain said upper and lower panel portions in closely facing engagement one with another thereby to retain therewithin any card residing within said receptacle pocket; v. a manually detachable apertured hang panel connecting to said upper panel along a manually separable perforate line defining said upper edge extremity of said upper panel portion.