The Pico Paso is a stepped tone noise noise synth designed by Dr. Bleep for Handmade Music Austin.
It’s similar to the Atari Punk synth, aka Forrest Mims’ stepped tone generator, but uses two triangle wave oscillators that can be combined or used separately. A wave shaper and square wave LFO are used to increase the aural ridiculousness.

It is offered built or as a kit that is great for beginners.