How far does it have to go before you will get involved? Do they have to draw blood? Bobby is 4 and Joe is 8. Joe could really do some damage to Bobby but you've basically told Bobby that it doesn't matter what Joe does as long as he doesn't leave a mark. You've basically told Bobby that you don't care what Joe does to him. How, exactly, is a 4 year old supposed to "work it out" with an 8 year old when they he outweighs him by 25 lbs? Didn't you just give license to the 8 year old to abuse the 4 year old?