Currently playing making something for the grand kids to play with.
I wish to make a a MP3 player with preset audio tracks. Tracks are played when momentary switch is pressed
I have seen tiny players that take a micro SD card.
I have mapped out my thoughts in the attached drawing.
I am hoping something similar already exists and someone has a circuit.

 

Many modules that do what you want are available. Just do a search for “mp3 module” and select one that satisfies your needs. For example, here is one that I think will work for you.

 

This post describes the module that I most often recommend. Very good, and with a little twist I find very useful—you land the sound files onto the module by plugging it in via a USB connection. It shows up as a mass storage device and you just copy files onto it.

It does some other tricks, too. It's my favorite so far.