This is a great "rally" card, one of several hundred that churches could send to Sunday School students if they didn't show up. I have a lot of them in my collection, and a common thread is to induce guilt in the recipient for not doing their part. The card above is typical. With the recent popularity of the "Hunger Games" books and movie, however, this one is also a little creepy if you think about it for too long!
Here's an earlier post on the same topic:
See you Sunday, if you know what's good for you!