I remember reading it at summer camp some years ago–a roommate had brought the book along in her back…
It was about a young German couple who’d just given birth, and the baby was very ill, and they were consulting the doctor who was giving them grave news, and the woman was sobbing to
(spoilered to protect the ending)
her husband, Herr Hitler, that little “Adolf must live… he must live…”
Does anyone remember this?
I’ve seen scenes like the one you describe in more than one tv show and movie. There was one like it, for example, in the episode “Cradle of Darkness” from the 2002 revival of the tv series The Twilight Zone: "The Twilight Zone" Cradle of Darkness (TV Episode 2002) - IMDb
Samuel French, Inc. is a major publisher of plays and for many years this company issued a magazine called Plays for Children. You might find the play you’re seeking on their searchable website: Homepage | Concord Theatricals
I’d run searches for “Klara Hitler” and “Alois Hitler.”
Good luck.