A very nice idea in my opinion, is to add to the game of bells. Which can be useful, for churches, or civic towers or simply for aesthetics. Very useful also for those who build medieval villages. There should be different types of bells from the smallest to the largest, with different types of sounds. Then maybe the bells can be played manually like with the string, and maybe when electricity comes into play, you can ring the bells with electricity, as the bells actually work in reality. Sorry for my bad english.