Book excerpt: The all-time favorite, now in a sturdy board book. There are 28.9 million children under the age of 5 in the U.S. and all of them will need to be toilet trained. This classic book has already helped millions of parents get their children through a life milestone with ease and some entertainment too. With Once Upon a Potty, a parent reads the book to their child or allows the child to read it while on the potty. Not surprisingly, the book takes some wear. This new board book edition will withstand such heavy use and survive the occasional water spill too. This is THE potty training book. It has it all, bright graphics, simple language, fun story and an anatomically correct hero. With an edition for each gender, the book relates directly to the child, making the potty-training process relatable and easy to understand.