As you'd figure, you can find all manners of bamboo products, from back scratchers to works of art created by master craftsmen. The Traditional Bamboo Market is held every 5 days or so (when the date ends with a 2 or 7) by the flats of the Baekchon River. The market starts around 7am and goes to midafternoon. If you miss those days, you can still find stores that sell bamboo wares any day of the week.
Note: This information was accurate when it was published, but can change without notice. Please be sure to confirm all rates and details directly with the companies in question before planning your trip.