I got some bitties through the 4H program when I was a kid. Raised over 50 chickens. Started them out in a brooder box in the house then moved them to a custom-built brooder box in the barn. We had to make sure it was sealed well to keep out the damn chicken snakes. The original brooder box wasn't secure enough and one day I went to feed some chicks and there was a fat chicken snake with a bunch of lumps in it stuck inside the box. It got beheaded rather quickly.
I wish I could remember what type of chickens I raised. I think they were called "fryers" but I'll have to see if my sister remembers. The main rooster got to be 22lbs and in his old age he got too fat to walk anymore. My sister got a blue ribbon for him at the 4H fair. In his prime he was an aggressive critter. Roosters HATE the color red. They particularly hate it if you wear red leotards and shake your butt at them while chanting "nya nya nya nya nya." Foghorn would charge and leap into the air to attack so we did that and we had to use trash can lids as shields. When red wasn't involved, ole Foggy liked to be held and petted. He also liked to chase the ducklings which angered the geese. I remember one day a goose grabbed him by the neck, dragged him into the pond, and was dunking his head under the water until I rescued him. Poor thing never fully recovered from that.
For the most part, my chickens were pretty docile. They like to jump up and they can halfway fly, so you need a tall enclosure with chickenwire across the top (to keep chickens in and predators out).
My cousin had some of those fancy "silky" chickens and they used to chase her and attack her all the time. Stupid things didn't even lay decent sized eggs. My chickens laid large eggs.
Since you have kids involved, I'd recommend having chickens for eggs rather than meat. I was just talking to a girl earlier today who raised a turkey and adored it only for it to disappear right before Thanksgiving and her mother cruelly broke the news to her that she was eating her beloved pet during dinner-- girl flipped out and threw the entire turkey on the floor so no one would be able to eat it. The mother should have kept her pie-hole shut.
If you do eat the chickens, best thing is to say the chickens moved to a bigger farm or something. Never kill them at home or anywhere the kids might accidentally see. Make it look like any chicken meat you bring in appears to come from the store. Never leave any evidence of killing and eating the chickens on texts on your phone or on social media sites that your kids might read.
It is imperative to keep the chickens contained, otherwise they get run over by cars, killed by dogs, killed by bratty kids, and they can get in to people's gardens. Some jerks across the street from my elderly friend had chickens that weren't contained and they were constantly jumping his fence and pecking the hell out of his tomatoes and other stuff.