Try playing out this hand without giving declarer (W) any advice. This is a good time, though, to introduce a defensive tip about the opening lead.

The choice of the top of a sequence of honours is always a good lead and certainly you must dissuade North from any thoughts of leading a diamond. I guarantee you that, most of the time, West will make just six tricks by cashing all the outside aces and kings before starting on diamonds. If you find a child that doesn't do this, congratulations - you have a natural champion in the making!

Now turn the hand through 90 degrees so that someone else has a go and play the hand again, this time persuading declarer to play on diamonds at trick 2. This time ten tricks should materialise - a four trick difference in the result. Quite striking and hopefully a useful lesson to learn. You will need to reinforce the lesson with other similar hands, but it is such an important point to understand that you should take your time over this.