Last week I dropped in on a very cool Finnish design exhibit being hosted at Lima’s ICPNA center. “Northern Stars” showcases more than 100 years of innovative design from Finnish designers and design firms such as Marimekko, Arabia, Nokia and Metso. El Híjo and I were hoping to catch sight of some Moomintrolls, the eccentric woodland characters invented by Finnish children’s author Tove Jansson, but as it happened there weren’t any velvet-snouted trolls lolling about the art gallery.  There were, however, some playful tree-shaped room dividers, rather like props from a children’s fantasy, that caught my eye. “The Tree,” as it’s called, is a piece of functional art created by the Finnish designer Eero Aarnio  (creator…