Christmas Bell

I have inherited this battery operated bell from my mother and father, I couldn't say how old it is but I seem to remember it back in my youth. This bell when switched on will jiggle about like mad and play Christmas tunes. The only thing is that some sounds set it off and when it comes to the end of the tune the bell doesn't settle down quick enough and it starts all over again, until we've had our fill and switch it off until next year!