This method of asking children to remember and describe their experiences has long traditions and was praised by Charlotte Mason in her Home education series (link to the whole text). Charlotte Mason considered this a great way to teach children perceptiveness and excercise their recall, as well as provide information about the environment (compare volume 1 pages 46-52).

Though her pedagogy is sometimes laughably wrong (blame the state of knowledge about human body and development in late 18th century) it is still generally relevant and, in consequence, popular among homeschoolers (a quick google search will confirm).

If you take into account that by asking questions you focus on some areas of development but not on others, then Feynman senior's method might be a good complement to it.