Make Your Own Beautiful Music

I second this:

This visual musical synthesizer by Andre Michelle is one of the most awesome things I've ever encountered anywhere. It's incredibly simple, effective and provides instant positive feedback in that almost nothing you do will produce an awful bit of music. I want my entire house plastered in something that does this. It also wants me to spend an entire weekend on drugs, just fucking around with this thing.

It's here and your day is over.