Qi chicken, to answer your question, yes, there are many roos out there that will not have a problem with your children handling the hens. I have around 8 now as a matter of fact. My son and my 5 yr old niece frequently handle the hens around the roos. I have 3 in a bachelor pad that wouldn't dream of going after us or the kids, and 5 more that are out in the yard with the girls all day, every day, and in the big coop with them at night. A couple of them run from us if we get close and the others will just stand there looking at us like "whatcha doin?", and hoping for a treat.
We've had 2 roos who were doo-doo heads, and they went to live elsewhere. IMO, you have young children, and they are at risk right now, so you just have to ask yourself, are the extra security measures it will be necessary for your children to take worth keeping your roo? By this, I mean are you willing to keep your kids in, or the rooster locked up, or having your children armed and never outside alone? Having kept a mean roo out of sheer stuborness on my part, I'm very familiar with what it takes to keep the mean roo and the kids from interacting, as your kids will come out the loser every time. I'm not saying any way is better for your family, just want you to be aware of what it will take to keep the roo and still keep your children safe. We've done all 3 of these things with mean roos, and decided the doo-doo heads weren't worth the aggrevation or the risk. Took a while to get to that point though. My yard is a much happier place since they went bye-bye. I wish you luck Qi, whichever road you decide to travel.