Because he can’t communicate his needs he he will need you to give him the words. Also, if he is getting attention from the bad behaviour he will keep doing it. Try saying a simple no and giving no other reaction

My son did the same. Could just be a phase.. here’s hoping

My little one is aggressive too and is from frustration, hunger or being tired. He knows he shouldn’t and I’m hoping when he can express himself better it will lessen. In the meantime we are attempting to manage the behaviour and not reward it.

Little ones of this age can’t speak up so often act out instead, I’m pretty sure childcare would be some what yo blame too

There must be a reason behind that aggressive behaviour, was he aggressive before starting the childcare or it started after he joined the child care. My 3 years old get aggressive and stubborn because I am pregnant and I cannot carry him as I did before or running around him all the time. There is always a reason behind child’s behaviour.