I generally don't act specifically differently in girl vs male mode so the way I treat children is the same as if I was in male made i.e. I don't specifically try and interact but if they directly interact with me I will interact back.
One time I was in girl mode with my wife wandering in a shopping mall and a little girl took hold of my hand obviously thinking I was her mum. I just stopped and said "sorry sweetie, I'm not your mum, do you know where she is?". Her mum was literally right behind us and she apologised profusely to which I just replied "no worries".