Ds1 is 6, ds2 is 3.5. This summer I've been home with them most of the time and every time they interact it ends in tears. Often it starts off as a fun game but ds1 will be pretending to be a wild animal of some sort and then ds2 will cry but ds1 finds it funny so will keep in scaring him. Alternatively, they end up physically fighting/wrestling and it'll start fun but end up with someone crying.
How do I make ds1 more aware of when to stop? I've tried punishing him with telling off and naughty corner but it continues! Is there anything I can do?