hi
as was said - on our local school there is "philatelic" club for youngsters. I provide all unwanted stamps to them (common definitives, CTOs, damaged stamps, kiloware) so they can train, collect and be involved in philately (teach them how to soak, collect, check,...) Unfortunately past few years club is not so active (corona!), but interest of few is still there (i help them privately)
damaged stamps are passed forward to art club, where they make pictures (stamps and glue) out of them
my dearest @fairytale78 has sent me a HUGE box of unwanted material and it is still here at my place - as an outsider i cant go to school yet (corona). when i will be able, i will give them material
if anyone is having problems with overload of unwanted material - kids would appriciate it ;)