I like to use the offcuts of wrapping paper to make 'hidden' labels: trim the offcut to be 2x1 ratio rectangle; fold in half with pattern outside; pinch the crease sharp; write the name and message on the 'back' blank half; fold the tag in half again; position the 'front' pattern to exactly overlay a corresponding patch of pattern on the package; tape the back message half down to the package with transparent tape.