New York Puzzle Party 2017

Puzzlers, sorry about not posting anything Monday or Tuesday.  Toy Fair at the Javits Center was exhausting. This past Saturday was the annual New York Puzzle Party.  There were 7 presentations. Of those, 4 were added to the schedule in the last few days.

Henry Segerman was added to the agenda on Saturday.  He's a mathematician at the University of Oklahoma. He presented his Quintessence Puzzle. I had seen this on Shapeways before.  He let me play with his copy.

https://www.shapeways.com/product/Y8V2E6NL9/quintessence-pulsar?optionId=41054600