Liam, I play (with varying degrees of frequency and skill):
six string acoustic guitar, twelve string guitar, electric bass, upright bass, banjo
, mandolin, all four ukulele sizes, and U-bass. If this sounds impressive, it really isn't. Once you have some depth of knowledge and technique on one fretted instrument, learning another is more a matter of remembering new chord shapes and scale boxes. Most of the skills and techniques carry over. I also play guitar in six different tunings (so far) because I fell in love with Hawaiian music in general and slack key guitar in particular. Acoustic guitar is my primary instrument, with ukulele as #2. What I cannot handle are fretless instruments like violin - I need some reference point like a fret or a dot.
Mostly through workshops at festivals my dabbling has included piano, dulcimer, harp, drums, and a few others. Back in high school I played mostly trumpet, also French horn, baritone horn, and even tuba for a while when our tuba player broke his collarbone. I'm an engineer, not a music major - lest anyone wonder.