Three Tall Ships
Here are 3 tall ships from me. I know for sure that the white fabric is 100% cotton. I previously started making these blocks with white fabric was bought too long ago to remember if it was 100% cotton. Two of the blocks used the 8-in-1 method described by Sophie, and the other used 3 inch strips for half triangles, blue scraps were already in 3 inch strips.
I also read the housekeeping post but was not sure about the reply mechanism.