In my house I have:
Piano: A console piano from my late mother-in-law. I took (half-heartedly) piano lessons as a kid and have enjoyed playing hymns and other songs by ear. I play the melody with one hand and broken chords with the other. So far, I primarily play in C and use the C, F, and G chords.
Electronic keyboard: From my mother. I received this before the piano. It may have a means of recording and mixing sounds since it has all sorts of options. I'd like to use my chart of frequencies for various instruments and play through the range of some of the instruments in the bank, such as violin.
Soprano recorder: It's a $5 Yamaha unit that I bought when I bought one for my daughter's music class at school. I get confused by the fingering.
Alto recorder: It's also a Yamaha. I prefer the depth of the sound over the soprano but don't play it often.
Clark tin whistles in C and D: I definitely prefer these to the soprano recorder, though I play them more "breathy" than I'd like to. I have gotten into the second octave on both.
Spoons: More of a novelty item than anything, but they're in the box.
Slide whistle: Does this count as an instrument? It's good for occasional silliness.
Harmonica: Another piece of plastic. No, I can't play it all that well. Oh, and a kazoo, too.
4-string banjo: I found this when cleaning my late father-in-law's house. It's a 1925 (or so) Lyon and Healy Washburn. I had a great time digging out information on the company and model. It has planetary gears, which means it doesn't hold a tune well. I'd prefer a brighter 5-string model, but I don't know how to play either. I've experimented with scales and a few chords.