So I'll try to keep this short and simple to save your time. (Also because this is probably really easy and the Arduino forums are known for lynching people that ask obvious questions ;))
I'm trying to make a simple device that will play an around 3-minute audio mp3 file when you push a button. The file doesn't need to change, it'll always be playing the same thing. It doesn't need to be very high quality, I was thinking along the lines of one of those cards that plays music when you open it.
I found this: http://www.radioshack.com/9v-recording-module/2761323.html#.VUeeNdpViko but I would really prefer to start from near scratch- I'm capable of soldering anything necessary and I don't really need anything that records, just plays the audio file. If you think that IS what I should be using any advice on how to make it work would be welcome.
So... I really have no idea where to start or what to do. I'm a beginners with Arduino for the most part. I tried looking around on the internet briefly, but couldn't find anything useful. Thanks for any help that can be provided!