They threw star knives as one of their many skills (jumping, film reverse, back up into corners roof corners was another). A year 6 student brought me a ninja star he had made for him (mum or dad folded it) after I inquired if he could teach me.
After a small amount of deconstruction, the elegantly simple construction was evident – strength and simplicity in what looks like an intricate machine. I liked it so much I made a coloured one, using some lovely little washi squares Mary bought for me (love your work Cass’)
Happy with this, particularly as the star moves upon itself and the “blades” retract into a lovely octagonal ring – very clever