Hi just wondering my son has knocking knees and is flat footed does anybody else's child have this if so do you notice that they fall over more than usual when they run my boy was 2 when this got diagnosed he is 8 now but unfortunately he has broken his leg(fibula) and a bone in his foot he was running and stumbled i do notice that he does fall over more than often and would just like to know if there is anybody else out there thats has this? many thanks