Creative Fridays: Cookie Sheet Calendars

I have been trying to come up with crafts/activities for our Super Saturday (for those of you that haven't heard of this -- it's a day filled with crafts, classes and humanitarian projects) at church. I heard about something called Cookie Sheet Advent calendars. It's a calendar on the back of a cookie sheet -- with magnets for each day of the month. This is what I came up with:

Then I also made a calendar that could be used year-round. You just change the banner each month. They are not quite done -- I still need to attach ribbon to the top so they can hang and some lettering on the bottom. And I have a really great idea for the #1 magnet but I am still looking for the material for it.

Here are some close ups of the magnets: