Once Upon a Potty

Over 7 million copies sold across four-plus decades is about as clear a signal as children's publishing produces. Frankel's direct, affectionate approach — using real anatomical terms and showing what accidents look like — works precisely because it respects the toddler's experience rather than dancing around it. Parents who prefer strictly modest treatment of the body should preview first, but for most families this remains the reliable, pediatrician-endorsed benchmark for potty training books.