Who knew? My niece is learning and her mum asked if this could be printed to help her with hand positioning. It’s a bit “stringy”. Put that down to old (and cheap) PLA.
Apparently the idea is that the octopus is placed on the back of the hand and the pupil has to keep it from falling off whilst bowing, so no rolling from side to side or anything like that.
I’m not sure what Nigel Kennedy or Vanessa-Mae would make of it, but I guess anything is worth a go if it means there’s less chance of sounding like you’re strangling a cat.