Presenting the 2013 Middle Child’s Day greeting cards from MidMark. Each card captures the joy of being a Middle Child and reminds us all of the special place they hold in the family. Boy, will it remind them. Of course, there’s a belated Middle Child’s Day Card — because maybe, just maybe, someone might forget. And fittingly, there’s even a hand-me-down greeting card. You can copy and e-mail them, or better yet — just send the link to this page and they can have them all!. What better way to tell the Middle Children in your life that you’re thinking of them — a little.