Visiting the arts & crafts store with my wife and daughter I picked up a stencil and on the second try got a design that I was quite happy with.:
The Ciril Hitz video that gave me the idea and illustrates the method is here: www.youtube.com/watch?v=OZt1WWSAj6M. I spritzed the dough with water before stencilling and I think that helped, but I still found myself hold the stencil in place with one hand.