I have just been to one two days ago. I wish I could have taken my children, but logistically this was impossible. It would have been wonderful to have them there, but in retrospect, as I was a pallbearer and had noone (I could ask fairly) to mind them if they played up and it was over 40 degrees it is better that they weren't.

I think it is wonderful to have children at funerals. I also think any attire is ok as long as it's not provocative.