The first time we went to Ohana, the server just asked what the kids would be ordering - it was like he didn't want them eating from the adult selections. That was OK with us - he offered them hamburger/fries, chicken fingers, mac & cheese, things like that.
The 2nd time at Ohana, we had to ask for something for the kids - but it was no big deal. I guess that server was waiting to see if maybe the kids liked the adult selections.
In both cases - for dessert, when they brought the bread pudding, they brought plain vanilla ice cream with sprinkles for the kids.