Time, perception of

Amy just said she wanted to eat breakfast.

Stella asked me whether I was ready to eat already, and I said, "five minutes", so I could just finish off the unread mails in my inbox (I only had four or five left).

At which Amy started crying, which I had half expected—but the kicker was that she didn't demand to eat breakfast now; rather, she said, "but I don't want to eat in five minutes; I want to eat in eight minutes!". Which is a longer time to wait, but I'm not sure she realised that :)