For young Japanese children, learning more than 1,000 kanji characters during their six years of elementary school is a monumental task, but the addition of some toilet humor has proved a huge success.A workbook series that features a heavy dose of the word "unko," the Japanese word for "poop," has quickly sold over a million copies since its release in March. The series' main selling point is that it engages children by using the word "poop" in every single example sentence."Adults would raise their eyebrows, but for children, the word 'poop' is magical and makes things fun," said Yusaku F…READ FULL ARTICLE