What age are they old enough to understand that you don't interrupt when someone is talking on the phone?
I was always brought up that if Mum was on the phone, then you didn't ask for anything/try to talk to her. I see loads of kids who just interrupt all the time, and you end up being ignored for the highly important "Can I have a biscuit?" to be answered and dealt with.
DD is 2 at the moment, and wants to say hello to anyone on the phone (very handy with salesmen), but when she's done that, she's gone. I know that soon she'll be more capable of asking for stuff, and I want to teach her to wait.
How is best to do it? Will she be too young? Do I just ignore any requests, or try to explain why to her?