I played recorder... i can still play it and often prove so to my mother's disgust.
Violin, I can pick one up and hold the bow properly and make sound come from it that doesn't sound like a screeching cat, but as for playing a tune now, I don't think I could, however it would all come back pretty quickly.
Trombone, I haven't treid but I reckon I could pick one up make a sound, but really same as the violin playing a tune I doubt it. I really wish I had never stopped playing this one, I really enjoyed it, but had to give it up cos of the teacher or something.
I started at the beginning of this year to lear Piano. So I can play a mean oh when the saints!

But its all good. I don't practise nearly as much as I should!