My 4 year olds behaviour has recently become much more testing...lots of not listening, pushing boundaries, being too tough and sometimes her younger sibling etc. We try to be firm and take her for time out etc, but also give her lots of cuddles and talk and try to explain why it's important she listens, doesn't hurt her younger sibling etc. She has just started school, and a friend who I bumped into earlier when feeling slightly tearful and exhausted said it's quite common for them to do this when they first start school (she used to be a teacher). I don't know if she was just trying to make me feel better but does anyone know if this is true? Any advice on how to handle it would be really appreciated as we are doing our best but I worry incase we are handling it wrongly. Thanks