There is no better way to learn electronics than building your own gadgets. thetinkeringtech has posted a project that shows you how to build your own rechargeable sound reactive LED Peace Pendant. You are going to need an Arduino, NeoPixel Ring, Mic amp, necklace, battery, charger, and a few other parts to get started. The goal of this project is to get your familiar with electronics and 3D printing.
You can find out more about the project here.