How about the Big Star quilt. Missouri Star has a video & Jennie's block finishes at 25". She also shows a nice way to set them.
I just finished one for my oldest son's 42nd birthday and believe me they were fast. I used flannel as the batting. Like Jennie I sewed the squares into 4 rows, then I did a sort of QAYG method where I sewed down my middle sashing strip to the flannel only & then worked like that to the top & then bottom.
Best wishes & good luck. Congratulations on your son's graduation.