I like playing with more basic drum rudiments on my other instruments, particularly the string ones, tapping, plucking, bowing and picking, down only and up only.
ONE n two n three n four n (4x)
one N two n three n four n (4x)
one n TWO n three n four n (4x)
one n two N three n four n (4x)
one n two n THREE n four n (4x)
I forget what that one is called, but once you get it down, it's a great warm-up on any instrument.
Bowing paradiddles and such is nonsense, but I find it fun and it seems to trick people into thinking that I'm a legitimate string player when I lay them into chord progressions.