Very cute! I have chalkborad fabric, it is more like a fake leather, but it is chalkboard I got it from Nancy Zieman's website.  Also, "Wallies" have this package of 4 sheets of chalkboard, like paper and I made a little chalkboard for my boys, I will try to take a picture of it and post it here so you can see.  I used what I had, I took 3 peices of 12x12 chipboard and glued them together for  strength.  Painted around the edges then added some scrapbook paper and the Chalkboard Wallie and embellished.  The Wallies where sort of expensive, but that is because I bought the package from a specialty store, I am guessing that you "Hobby Lobby" would have them at a better price, they come 4 to a package.