05/10/2026
The hitting, the screaming, the running into traffic, the meltdown over the wrong colored cup. If you have a child between 2 and 4 you are not failing at parenting. You are living with a brain that is neurologically incapable of stopping itself and that is not an exaggeration.
Neuroscientists describe this stage as having a massive go system and almost no stop system. The part of the brain that generates impulses, big emotions, and the urge to act is fully online and firing constantly. The part responsible for pausing, reasoning, and regulating those impulses, the prefrontal cortex, will not be developed enough to help for years. Your child is not choosing chaos. They are a brain with a gas pedal and no brakes.
This means that when your 3 year old hits their sibling, throws their food, or falls apart over something that seems completely insignificant, what you are watching is not defiance. It is a nervous system that felt something enormous and had absolutely no internal mechanism to slow it down. They could not stop themselves even if they wanted to.
Understanding this one thing changes your entire response. Because you stop looking for the logic in their behavior and start responding to the neurology behind it. Less why would you do that. More their brain could not stop, so mine has to.
You are not their punisher in this stage. You are their brakes.