I teach simple knots and lashings as part of Outdoor Education sessions to primary children - it's great: gentle on the fingers, rolls nicely, keeps stable bights and loops, doesn't fray once heat sealed and best of all ALL knots, even the invented ones and pulled as tight as you can ones, are easily un-doable! Got some 3mm cord, too - probably slightly better for lashings.
Prompt service and delivery. Am using the cord for 'knots and lashings' for small pioneering projects in outdoor education. Easy to handle, manipulate and undo for children.