These are vintage cards, dating to the 1920's, some are die-cut.  The 2 little girl cards can be propped against something to stand up; the circling white heart folds back to form a support.  The girl in pink has a crease across her neck but the girl in blue is in perfect shape.  The two die-cut birth announcements feature a cherub with an umbrella and a baby nestled in a water lotus.  The Valentine postcard is dated 1920.  All have written greetings on them.