I'm thinking if it were me, I'd be telling myself,"of course, I could make every other a 12" block and then do a block of 4 6"ers then a 12" and alternate." LOL Not that I'm a defeatist, but just the stress of thinking about that many pieces in that few months would set off a fibro flare for me. Or I'd be thinking how it would make a nice quilt for their first anniversary. LOL.
I do love your block. The colors are wonderful! Good luck and good speed with your project. May it bring you joy!