This is such a fun book to read! A book about toilets with "clean" humour in Mandarin is right up my boys' alley. My boys love to pore over the tiny details, encouraging them to let their imagination soar! They sometimes just look at the pictures and start giggling.
If you ask me to think of an interesting variations of toilet bowls, I probably can only come up with a handful. Who knows there can be so many variations, the only limit is one's creativity!
Sample text (Idea from @playfull.sg!)