I was watching a show on HGTV called "I want that". And saw the coolest thing a multi functional fishtank sink. I thought it would be great for the sims and perfect theme for a kids bathroom.
This was a team project with Katy_76 who made the glass subsets and added slots. 
I will admit Im not good at all with Bathroom meshes. But I just had to have it for the sims so I converted 3d meshes from here- 
http://www.archibase.net/gdlThan I add all the fish and tank decor in them, for the look I was after.
Credit- To Meshkiste for the rug mesh(included with recolors)
http://www.meshkiste.de/          To Katy_76 for glass subsets & slots 
Mesh Info-  Fish are just deco no animation or fish tank function added
                There are 3 different colors to choose from. 
                All 3 are meshes since each has custom glass colors.
Enjoy!