more than just yarn
No idea of what you can teach/show others?
How about:
knitting technique (crochet, weaving, tatting, needle felting,
etc.)
cooking technique or recipe
bartending trick (can you make a mixed drink? show us how!)
floral arranging
table setting
fly tying
yarn dyeing
pasta making
bread making
whittling
teach a card game or other game
set up a scavenger hunt
Italian phrases
drawing
swimming (there's a pool)
an exercise routine--some good stretches for the traveler would be ideal!
gardening technique
there are no limits!