From the article:
Thomas Romain is a French anime artist who lives in Tokyo. He’s worked on various series including Space Dandy, Basquash!, and Aria, but his best ideas actually come from his sons. Working together in what he calls the Father And Sons Design Workshop, Thomas and his kids come up with all sorts of weird and wonderful characters. Well, his kids actually come up with them, and then Thomas adds his professional touch to turn them into everything from steampunk doctors and snake fighters to cloud dwellers and sand golems.
I knew this reminded me of something. It was the 1963 MAD Magazine cartoon about if kids designed their own toys.