I used to build models, mostly 1:48 scale airplanes, when I was younger. I stopped doing it around 13 or 14 years old. I still have a bunch of kits that I never built but I have no idea what to do with them. I'd prefer they go to someone who would actually build them. I will not throw them away or donate them. Not that I have any problem with donation but I'm afraid they would get abused and broken or pieces lost.
I've still got a Testors YF-22 model kit. You know you're old when the models you built as a kid of prototype aircraft are soon to be retired.