I have had such a stressful morning 
I've been looking after a 3 year old boy for the last couple of months. He was my first 'customer' as a childminder so I'm pretty new to all this...
He's being incredibly rough with my almost 2 year old and I really need some ideas as to how to deal with it. The problem is it's very rough 'cuddling', especially round the neck rather than out and out punching or hitting. I've been very positive up til now, lots of showing him how to be gentle and praising him when he is. I posted before about this and got given the idea of cuddling him more myself and getting a soft toy for him to cuddle, unfortunately he has no interest in cuddling me or soft toys!
By the end of his session today my poor DD was beside herself and couldn't be put down, he just wouldn't leave her be. He goes completely 'deaf' when I tell him to stop.
I can't work out whether he's actually trying to hurt her or not - he's a very fighty little boy, comes over with guns and talks a lot about fighting and killing people, likes dressing up as a Power Ranger etc etc. But he does genuinely seem to like my DD - told me today he loved her 'so, so much'. If my DD ever tries to push him away he uses this as an excuse to actually hit her, telling me that he's supposed to hit back if anyone hits him.
I keep them as busy and distracted as possible which does help but whenever we're just playing it's exhausting to be constantly having to phsyically stop him from throttling her.
Any ideas??? At what point do I talk to his mother about this, if at all?