Afternoon tea conversation

After a full day's work we concluded our business talk while picking up my business partner's children from school. The oldest one ran off with a friend and we took the six-year-old, a pretty princess, to afternoon tea and cake before walking back to the house.

This is how the conversation went:

My business partner: 'Hey, Princess, we want to talk to you. We can't do that if you are playing on the phone.' (Princess wanted the iPhone.) You know, you don't have to wait for us to ask you questions. You can also ask questions to us.'
Princess: After some careful thinking. 'What is your favourite colour?'
Me: 'I think it's still blue. What is yours?'
Princess: 'Purple.'
My business partner: 'Oh, I thought it was pink?'
Princess: 'No, I changed when I turned six. Now it's purple.'
Conversation moves on...
Princess: 'What is your favourite type of swimming?'
My business partner: 'You know, Princess, you can also discuss topics which are not just the answer to a question...'

How to bring up children to master the art of conversation and social skills!