"There was a whole community of doubters looking at their textbooks for inspiration, or perhaps I should say for lack of inspiration, and saying it couldn't be done, " says Friend.

FORBES: Seeing the Light

Or perhaps I should say, an unsurprisingly large difference.

FORBES: Find Gratitude Cues in Everyday Life

Tell us what is new or I should say, perhaps, old in this toilet training practice.

NPR: Slate's Medical Examiner: Earlier Toilet Training