Follow the rest of the instructions on the website.
Register your copy of Wii Fit Plus™ with Balance Board™ Accessory at Club Nintendo and receive a complimentary tote bag. To get a tote bag, you must be a member of Club Nintendo. If you're not a member, you can join today for free! In addition to being eligible for tote bag offer, when you register, you'll earn 100 coins, which can be redeemed for exclusive Rewards! Offer valid only to US and Canadian residents 13 & older. Valid while supplies last. Limit 1 bag per person.