As there are six color groups of blocks I used six different brown cotton fabrics for the bears. The embroidery file from all stitching.com includes a boy bear and a girl bear with a bow in the "hair".
I used an acording piece of fabric to each block and sewed it to the solid color (also six shades) and placed the machine applique right on the seam that it appears like the bears would be tucked under the linnen. After that I sewed it to the blocks and added the attic window and the frame.
Hope this answers all your questions
Granny