I echo the tip for savoury crepes and Breton cider - a must! At most crêperies they bring back the menu after you've finished your crêpe and you can order another savoury one or go on to sweet ones. Savoury crêpes are made with buckwheat and are delicious, sweet crêpes are what we think of as 'normal' pale coloured ones. Eat as much fish as you can! Breton seafood is so fresh and delicious. If you're self-catering, get along to the local fishmonger and ask for some tips - he or she will tell you what is freshest and best quality, and how to cook it if you're lucky. Langoustines or moules marinières are always a good bet. In the supermarket you also get lovely "carottes de sable" which are very sweet carrots grown in sandy soil. Go to the boulangerie on a Sunday and marvel at the fancy cakes. Beautiful concoctions of whipped cream and pastry! Try to do a tour of a biscuiterie as they're usually quite interesting and the biscuits are gorgeous, as mentioned somewhere above. You can also visit the HB Henriot factory in Quimper which is famous for its hand-painted china. Henaff pâté is a famous Breton product that you might want to stock up on before returning home. Have fun!