Intro: LM386 Audio Amplifier - Step by Step Tutorial
The LM386 is a great little amplifier chip that can take almost any audio you throw at it, and amplify it. So we have here a step by step video on how to set it up on a breadboard and if the sound is something you're interested in, we also have a kit for it!
You can find it here: https://www.tindie.com/stores/tymkrs/
And more information here: http://www.tymkrs.com/kits/lm386kit/