A Western Australian mum has revealed the truth about her family's nappy poo knife. Not the POO KNIFE!! “We actually thought it was hilarious as mum thought she had made a great discovery. Jeanette’s kids are now grown up with children of their own - and still find it hilarious that their mum used a nappy poo knife. In fact, Jeanette’s eldest daughter loves it so much that when she spotted Kidspot'snotorious poo knife story the other day, she sent it straight to her mum!