What would you recommend to try to deal with an older child deliberately teasing/winding up/being mean to a younger sibling?
Two boys, 7yo and 3.5yo. I'm sure like with every set of siblings sometimes they play nicely together and sometimes they don't. But what sort of approaches would you recommend to try to reduce or address the teasing and causing deliberate upset behaviour when it starts.
As an example: playing mostly nicely together, then out of the blue the 7yo will take away the favourite toys the 3.5yo was playing with and will say they've been eaten by a dinosaur, they're gone now and never coming back. Or during a roleplaying game he'll say his little brother is in prison and has to stay there forever and ever, sends him away to be shut in a cupboard. Or 3.5yo will have been building something with duplo, his brother will get a toy car and drive it into the building and knock it down or shoots lasers or whatever at it.
These are more than just the natural storylines of games, and it's deliberately to cause a reaction. The 3.5yo gets upset, screams/cries, and often then physically attacks his big brother to stop him doing these things. 7yo is told to stop upsetting his brother as this escalates, but he often continues anyway. He seems to enjoy getting a rise out of him. When asked why he would want to make his little brother sad, he says he doesn't know.