I helped people learn to use a spindle to spin yarn, and sent four people home with drop spindles and wool. A couple of them, I let them struggle for a while. They were trying to draft fibre after they'd allowed the twist to run up into the wool and lock everything up. I was sitting beside them, spinning a little yarn or knotting handspun bracelets for kids, available but not intruding. Finally I said, may I, and reestablished them at the place where the fibre drafted freely, winding the felted stuff onto the shaft out of the way.
I liked the setup of the demo area this year. I was seated on my own between a table and a tent pole, with one empty chair beside me. It was like a little nook.