Therefore, please allow me to refer to a behind-the-scenes story about the episode itself exceptionally instead of the design and sculpture of the characters.
While this episode “Grow Up! Little Turtle” was written by Masahiro Yamada who also seems to have acted as a poet, the story is said to have been a fantasy originally titled “Taro’s Picture Book” in which Taro, boy in wheelchair, traveled to a paradise with only children living there.
The story was changed into “Grow Up! Little Turtle” through arrangements between Yamada and the director Harunosuke Nakagawa as Nakagawa says he wanted to satirize adults lacking hope who try to deprive children of it.
Nakagawa was a director who portrayed children with profound love while directing three episodes for “Ultra Q” including “Grow Up! Little Turtle” with the other two: “I Saw A Bird” and “Kanegon’s Cocoon,”
It is said that Nakagawa was nicknamed as “Film Monster Harugon” because he consumed a lot of films that were so expensive back then to shoot his directed episodes due to his uncompromising attitude toward each episode.
It seems that “Grow Up! Little Turtle” also had a larger amount of unused or rejected films than the product actually aired.
Nevertheless, he got credit for especially “Kanegon’s Cocoon” that managed to win high reputation and great popularity as a modern allegory.