Miniature doorbell for DIY Santa's house

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hi! have been making miniature santa's house out of wood. premiered christmas decoration 2 years ago, , children loves it. however, i've improved it's functionality since diodes representing fireplace , diodes outside in (cotton) snow outdoor lighting. looking smooth. unfortunately diodes inside powered arduino aren't strong enough lit interior enough cozy outside, solved placing battery led chain inside on upper walls. have settled solution.

i have hacked led tealight it's diode on outside of door, on/off switch inside. working good. thought of making controllable app, feel kids enjoy turning outdoor lights on/off manually more. surprise random effect of santa's presence, because have programmed fireplace , outdoor diodes randomly turn on , off, when santa home or away.

now, kids suggested improving adding doorbell.
any ideas how pull off? thought sd card/mp3 shield, possible trigger play when button pressed?  

smoke chimney suggested. hehe. advices or suggestions on that?

quote
but possible trigger play when button pressed? 
yes , don't need arduino. dfplayer.


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