Ive been playing with the Korg electribe er-1 and Korg Mini recently and Ive been loving the results.
So much so that Ive been eying out the Korg volca family of synths. Each unit is fairly cheap, meaning you can collect each piece over a period of time.
Whilst researching these toys I came across these videos on Youtube posted by Chocolate Pulp worth watching.

(microbrute, TB3, Electribe ER-1, Volcas, TCE Halloffame, EHX Cathedral, kp2, mkp2)

(TB3, volcas, Boss RT-20, microKorg, EHX Carhedral, TCE Flashback, minikp 2)

Korg Volca Family.
Korg volca family