The BFF Module (Best Friend Forever Module) is a Rank 3 Module that grows 20 Yellow LEGO Bricks a day (1.67 per hour) with a harvest limit of 40 bricks. The owner of the Module may choose a user on his/her friend list to be showcased in the module on their page - that friend will then receive a Princess Sticker via mail. For every Yellow LEGO Brick the owner of the Module harvests, the selected friend also receives the same amount. The Yellow LEGO Bricks are not sent via Mail, but simply appear in the friend's Inventory.