Ok,when my son is kicking the poo out of something the nunchuck stops working mid game,despite the fact it had done previously.Any ideas? Thanks.

The cables in the earlier nunchucks worked loose over time with vigorous use, the weak area was were they plugged in. How olds the Wii?

That was it, I had picked up the nunchuck from the bargain box at game when I bought a couple of games. Thanks.