A 3x3x3 LED cube is a great beginner's soldering project. 4x4x4 takes a little more patience, 8x8x8 SINGLE color LED cube is challenging. But an 8x8x8 COLOR cube is insane!
So, I've been brainstorming on how to make it simpler and I think WS2812b addressable RGB LEDs is the answer!
Resources