Rotties can be bothered by loud noises and children’s rough play and will try to put an end to it without understanding that “their” children are not in danger. They might also chase after young running children. Always teach children how to approach and touch dogs.
Teach your child never to disturb a sleeping or eating dog, or try to take his food.
However, strangers or adult dogs could become a problem if they become part of the household later, especially dogs of the same sex.
Keep your Rottie on a leash outside to avoid aggression and combativity towards other dogs. The Rottie shouldn't necessarily be taken to off-leash dog parks.