We have a 3yo (3 years and 3 months) LB with no developmental issues or suspected neurodivergence. We also have a 9mo. Overall DS3 likes his baby brother and wants him to be involved, however, sometimes (I think relating to not getting enough attention) he’ll do something unkind to him; bang him on the head with something (not hard), Wake him up when he’s been told to be quiet, squeeze his face, snatch things away from him etc. nothing horrendous or physically harmful but he’s clearly misbehaving, he’s doing it because he is not supposed to. Usually I try and avoid these situations occurring and separate them if I can see we are headed that way but it’s not always possible. Would you ‘punish’ a child of this age for this type of behaviour and if so how? I wonder if he’s too young to fully understand consequences and to control his impulses but maybe I’m wrong?