Ewan has picked up a rather unpleasant habit (from one of the other boys at the childminder, whose mother had NO boundaries in place for her son!). However I also know he doesn't do this AT the CM's, just at home

When we ask him to do something (or stop doing something) and he really doesn't want to he says 'shullup' (shut up) and then blows a raspberry in my (or DH's) face.


We have been using the "warning followed by time out if it continues" with no shouting involved but it isn't really stopping the behaviour recurring. Time out involves him sitting in the hallway for 1-2 minutes and then whichever one of us put him there goes out to him and says what we didn't like and why. Sometimes he says sorry, sometimes he just wants to give a hug (to which we respond 'I know you are sorry for xyz'). We have been saying that it makes us sad, that is is rude or mean.
Any suggestions, or do we just persevere a bit longer until he stops / get sick of it?