Seam three, half way done

I had some help today from my three little girls while doing the third seam on the cathedral windows blocks. I pinned and chain-sewed, and the girls turned and pulled out the corners. We got about 1/2 of the blocks done; this is probably one of the slower steps.

My chain:

Littlest daughter's helping hands (7yrs) turning to right-side out:

Middle daughter's helping hands (9 yrs) turning to right-side out:

Oldest daughter's hurt helping hands (almost 11 yrs) (she hurt her hands crashing on a bike at her cousins' house the other day). She is using a pin to pull out the corners after they have been turned right-side out:

Where they stand at the moment: