Andrea-- for the blocks, they are swapped EACH. You may get all 12" blocks back for yours you sent in or I may include one that is say, 12x15. On the smaller blocks, I am hoping to keep them like sizes, but we don't know how many of what sizes will come in.
And so far, lots of sizes!! Big ones, little ones, and in between!
I think I hear the chickens clicking at me. Guess I need to feed them breakfast! :)