My 18mo boy had 2 unpleasant encounters with toddlers recently. One pushed him down and another choked/strangled him from the back with his arm. He's v mild mannered and doesn't rough play or retaliate and ends up crying. Since then he'll run away or towards me whenever other kids approach him for fear that the same thing might happen. It saddens me to see that coz I want him to play with peers. He hasn't been to sch yet so he's mostly at home. I've tried talking to him to tell him it's ok but he still seems afraid. Is there anything I can do?