Building a LEGO sink is not difficult at all. You will need only 6 simple parts: 2 1x2 thins, 1 2x2 thin, one sink element (this is kind of rare so if you're not able to find it, you may have some trouble making the sink), and 2 1x1 right-angle elevated bricks. Starting with the 2x4 thin, stack the 2x1s on top of each other and place them on the end of the 2x4. Now take the elevated bricks and snap them on the other end. Finally, attach the sink element so it is facing the elevated bricks. This is the perfect size for a mini figure.