We had stacks of kids at our wedding (2-14yrs) - about 30 - 3 kids tables - close to the door! BUT we were at a country RSL and they put out "kids food" sausage rolls, party pies, sandwiches, cherry tomatoes etc - all finger foody stuff and only charged $9-10 per kid. actually the adult meals were only $25 for two courses!

However, a friend had her wedding at a place where anyone who needed a seat and food was charged at the adult rate $90-100 per person - there was no way they could afford this. To invite some kids they would have to not invite some adult friends and family. So in this case - BF bubbas or little people who can stay on laps were ok - she personally explained this to anyone with kids - and they seemed to understand. Only her neice (only young relo) attended and the two flower girls. I donlt think she was being unreasonable under the circumstances.