Sandra from my local quilt group donated to me for charity a whole pile of unwanted blocks.
She had made a pile of sting blocks, cut them and resend them into mixed blocks.
They looked very messy and she lost faith.
(Sorry, should have got a photo)
So I sat there one night and unpicked all the blocks. It left me with a great pile of string triangles. There was also a strip of matching fabric.
I packed them all into my retreat bag and got them out where I had room to play.
I put my thinking cap on and came up with the idea to pair them as half square triangles.
I used up all the fabric but not the blocks.
They ended up 10" blocks so now measures 40" * 60".
A great charity size.