Source: theverge.comNintendo’s plans for a NES knitting machine accessory revealed
We thought it had to be a fake at first, but an LA Times report from CES back in 1987 actually mentions the accessory as being part of an “offbeat knitting demonstration.” The device apparently allowed you to hook it up to your NES and program in items of clothing for it to knit automatically, patterns and all. The Times said it could make mittens, socks, and a variety of other items, but the flyer only mentions sweaters.
I wish this was a thing :(