No that's him getting worked up to get braver and very likely will start biting and actually kicking to scratch. With kids that young, it just is not worth it if you don't know what to do. Those claws and spurs can easily reach a toddler's face level... all it takes is only once to do possibly major damage. Not worth it.
Not all roosters become dominant or aggressive. It is a mixture of genetics and environment. There are some roosters that will stay non aggressive no matter how you raise them and then there are roosters that will be mean and attack every one no matter how they are raised.. and the rest are somewhere in the middle.
the above brings up a good point. you probably want roosters that just don't care either way about people. Calm. No roosters that are constantly alerting at people, making noises even if he doesnt seem to charge at people.. No young roosters that are too interested in people, following someone around, begging for treats etc. Those are the ones that have no fear of people so if they have any inclination to aggression, that combination can make them extremely nasty.
It's the "huh? people? whatever dude...." and go on what they were doing that probably are good picks in a pet or kid situation.