Iceblossom

Well the red pineapples are definitely Hawaiian!

6 18" blocks is pretty good sized already for a lap quilt, wouldn't need much in terms of sashing/borders to finish it off.

Typically Hawaiian quilting is echoing the pattern in narrow rows. I think a stipple that does follow the outlines of the blocks a bit would be in keeping and a simple way to do justice to the blocks. Another concept to make the top larger would be to add alternating blocks or half-blocks of plain fabric where you quilt a traditional Hawaiian flower design in the plain blocks.

Edit: Should mention that pineapples were a common motif meaning welcome or hospitality and could indeed be in any number of East/South coast traditional quilts. I think the two-colored one is Rose of Sharon, which is often used for a wedding quilt, the others are using heart motifs. Not so sure about the one with a lyre? flower? Or what the meaning of the Fleur de lis is, but there is, I think, a theme to the blocks and maybe that can be played up some with border ideas...