I only just thought of it, really. I just know quite a few children who would love the chance to play a recorder or other instrument. Sometimes even very battered instruments are useful. I had a cornet given to me, which is very tatty but it has been great to show children a real instrument rather than just photos. They like to giggle at the dreadful noises I produce with it, too!
Recorders are quite good because the plastic ones can be cleaned easily. If you meant you had whistles not being used, please PM me because I am sure I can find a loving home for them, too, or at least use them in schools to give children chance to see another instrument. Maybe, you ought to just have a little try on those whistles...you never know, you may feel inspired to play again, yourself... :-)
(Can you tell I am a hoarder, myself?!)
Thanks for replying and will be listening for distant whistling! :-)