Your child's tantrum can be incredibly frustrating, but try to force yourself to react calmly. Staying in control of your own emotions prevents the meltdown and their aggression from escalating and models good behaviour. Don't give in to your angry child's demands, or you'll teach them that their bad behaviour is an effective means to get what they want. Instead, positively reinforce good behaviour, especially when they're able to calm themselves down and express their emotions in a more positive way, while giving consistent consequences for behaviours you want to discourage.