Englishpatient - occasionally, but not often enough. There isn't a huge amount of common ground in terms of interests (4.2 years between them and opposite genders, so not surprising really), at least at home - it's better if we're out of doors doing something active. Sometimes I get them playing board or card games, with or without me, but it doesn't happen often.
They play-fight and wrestle amicably sometimes, but all too often it descends into real fighting. What really gets me is that the older one responds negatively to anything the younger one says 90 per cent of the time (tells her to shut up, says she's stupid, nit-picks everything, calls her fat and so on) - it seems to have become a reflex action for him - and if I pick him up on it, he starts accusing me of favouring her etc etc. I would ignore it more, but it makes for a very difficult atmosphere at home, and I don't think it's very healthy for her being subject to constant put-downs and insults.
I think it doesn't help that I'm now a single parent so they are always competing for my attention, particularly at weekends and holidays. I had hoped that a bigger age gap might reduce bickering, but that doesn't seem to have worked out.