Does it seem as if your toddler is constantly breaking the rules and you're constantly saying "no"? Don't take this as a deliberate sign of mischief, it's just normal toddler behaviour. He needs to assert his independence. You can ease frustrating moments by explaining the reasoning behind your rules. Saying, "You can't touch the cooker because you might get hurt," will make it easier for him to stay away. Another tip: Head him off at the pass with a little advance warning. If dinnertime is approaching and your toddler is immersed in play, say: "Five more minutes but then you must come to the table." This should help you avoid calling him again and again.