Most communities with any sort of support organization for low income families have means to help distribute/recycle good childrens clothing and sports equipment so it is optimally reused and likely appreciated.
The conventional thrift store chains for profit proliferate here and they are big business but there are often hospital auxilliaries and other great thrift stores. I tend to buy at consignment shops as you get very good quality at a hugely discounted price on barely worn things , even a barn troll like me likes to dress up once in a while.
I think this is off topic for the cooking and preservation forum
