In my case the answer is on the train.
Unless you can't find a place to sit or you fall asleep before you even take the sewing kit out.
Anyway, the train rides this week have been sponsored by the letter k:
I have a plan and although I can't share it yet, I can tell you that it involves some more letters and this lot:
And I may be re-inventing the wheel, but since I want the letters to have random shapes and sizes and to be EPP friendly, I'm drafting them myself, so promise not to laugh to much at the final result.