with kids I would keep it very much combat sport- kickboxing/ grappling and then some awareness and maybe some fence/verbal anti bullying type stuff
deffo nothing on eye gouging, ear biting or any type of aggression work! you just leave yourself wide open
even so when I think about what I would teach my own children I probably wouldnt focus too much on that side of RBSD anyway- even without the worry of legal consequence- cheesy as it sounds, I would say for young ones: self confidence, self respect and awareness are the best forms of defence they can have...
*cringe*
if they grow up strong, fit and wel cororidnated from their combot sport training they will be well ahead of most mugs anyway