Blank Blocks

I am looking for ideas for these blocks. These wooden blocks are from one of those calendar things that you rotate to change the date. I was going to get rid of it because it was in pretty bad shape and decided to spray paint it and use it in some "anal-retentive hoarder" kind of way :)  I have foam blocks with setting/characters/plot....literacy questions...I am looking for unique ideas. I welcome any suggestions :) I'm having a mental block :) (Pun intended)   Teri