Glitch Storm is an exploratory synth that can be build and soldered even for total beginners. It produces a plethora of blips and blops ranging for chords, techno rhythms to alien soundscapes and FXs.
https://www.tindie.com/products/jc2046/glitch-storm-multidimensional-diy-synth/
Need 6x m3x10 + nuts
Print as the linked picture for better strength.