Hi all, I'm after some advice/experience of toddler hitting baby and how to handle it. My son was 2 in sept and I have a 3 month old. He was jealous initially and ignored me when we came home from hospital but then seemed to gradually accept her but last week or so he has started to hit her. I don't leave them alone in a room together but he will hit her ( slap her) in front of me without any warning before I can intervene. I tell him off sternly immediately and explain he must be gentle and not hit her and make him apologise but then an hour later he might do it again. He almost laughs at me when I'm telling him off. Yesterday I tried a naughty step to remove him from situation but it didn't really work as I don't think he understood? Anyone any ideas on what might work? I know I need to sort this asap and be consistent. Thanks.