These are fantastic for sewing or other needlework (embroidery, cross-stitch). I am a fairly advanced sewist (make all of my own clothes) and I use Frixion pens to mark absolutely everything, and teach sewing lessons with them. There are so many colors, you can find one to show up on any fabric, and they disappear with just a pass of a relatively cool iron. (Of course, you test first - since the ink is water-based I have heard of it marring some fabrics.)
Also, water soluble glue. Essential for good sewing.
[On topic because it’s Mark and I’m a maker right? I mean, “maker” usually implies technology, but my sewing machine has more buttons than the Apollo command module.)
