Cool, I have it on order but I had been wondering even after Cod's thread if it would work with a three-year-old. DD is a little younger (3.2) but this gives me hope.
I am looking forward to finding out what the correct response is to 'I'm hungry' when the automatic one would be 'that's because you haven't eaten a single thing I've put in front of you ALL day, you ridiculous child'.
And whether there is an equally effective alternative to 'do X or I'll switch the television off'.