Here are my brown 3-1/2" string blocks...all 72 of them.
I did these a bit different than Bonnie described in her directions. I started with an 8-1/2" x 11" piece of junkmail. Don't we all get junk in the mail? I then started piecing my strings...most of which were cut down to 3/4" to 1-1/4" for more variety. When I was done covering 12 sheets of paper...I removed the paper, then trimmed them to 7" x 10-1/2"..which after being cut down even further, yielded 6 mini string blocks the size that we needed for this part of the mystery.