I tried to type this yesterday but the Ipad is not my friend.
We are noticing that Three is very much a work in progress. And it does include some much better things but especially when we add in Crawling (or as DS has it, Clawing) it includes a lot of challenges.
DS has been struggling a little with being home with DH while I am back at work, with the excitement of a visitor over the weekend, etc., but in general some of our previous flashpoints (bedtime, night time nappy, teeth brushing, and even to some extent walking in the street) are becoming much, much easier. We've had a little backsliding on early waking but we have a plan for that (set gro clock much earlier, lots of praise for being quiet before it comes on) but it didn't quite work this morning (need to sit down with DH and agree all elements of the plan)
However we are really, really struggling with shouting and in particular roaring. It tends to happen when one of us raises our voice (yes, yes I know we shouldn't but it's really hard not to occasionally), when DD cries (I'm not sure if that's because DS is frustrated and behaving like a very very young parent who can't control themselves when a baby cries, or if he thinks he's telling her off, which is kind of what he's doing when we shout, or if he thinks it will calm her down in some bizarre way), or just randomly when he thinks it's fun.
We generally respond to it in one of a number of ways (which is probably part of the problem). If it's us that was shouting, we do try to calm ourselves, say "no, Mummy and Daddy shouldn't shout, let's all be quiet". If it's clearly upsetting DD we try to remove HER from the situation, say "poor DD" etc. etc. while ignoring DS' behaviour. However, that's often not possible e.g. if she's strapped into her high chair. We also try and remove DS from the situation as we would for e.g. hitting or throwing. DH tends to sit with him and firstly show him how to count to calm down and then get him to count to five calmly. However, he starts to see this as a game after a while; when throwing things was a big issue (it isn't as much now) he would throw something deliberately and then come over to sit with us and count and then repeat...
I've tried to do a more lengthy "time in" or "time semi-out" with him either on my lap (which leads to kicking and shouting and "no hold me") or in his room but sitting just outside with the stairgate closed (he is calmer in this situation but it's rarely practical especially with a now mobile DD who is also trying to climb out of the high chair).
I feel like some things we can ignore and DH seems to manage to ignore hitting (hitting him that is rather than DD) but given that DD reacts, this is hard to ignore.
We do try very hard to praise for being quiet e.g. sitting at the table talking normally or being quiet rather than roaring gets lots of praise for sitting nicely/quietly/having a nice quiet conversation. But reminding him that he's being quiet can often lead to roaring!