My 35 month old has begun to say 'no' at pretty much every point, all day, every day. Sometimes he can be turned around by explanations of a situation, or distraction, or bribery. More often he will have a tantrum which is powerful but short lived - until the next question, request, direct order, sobbing entreaty comes along. His language is delayed, probably by 6 months or more & I suspect frustration is the root of the problem, but an advice on tactics or coping mechanisms happily received.