I’m learning how to weave with tablets. There’s a set of threads, every 4 threads pass through a card. A typical piece requires about 16 cards. They are turned forwards or backwards, this twists the threads and they are locked in place by passing a separate long thread throught the twisted ones. Colorful belts and tapes can be made on this. Tablet weaving dates back to 8th century BCE, doing ancient stuff is fun.