I have 3 children and 4th on the way ! my eldest is 7 and boy n girl twins who are 4 ! the twins are a little confused about mummys big belly but i tried to explain to them about a little baby growing inside, they were getting about it until their 7 yr old brother told them that babies come from mummys poop ! now everytime i come out of the bathroom the twins run in to look down the toilet ! iv told them No but they still believe there older brother .. they recently started school and just last week i was standing at the school gates when one of their friends mum came up to me and said that her child started looking down the toilet ? .. the twins wont listen to me.. iv tried to get their brother to tell them he was jokin but they are still convinced there in mummys poop .. How can i fix his ?..