it hockey?
I played ice hockey since I was 4 years old, and every summer I would spend hours playing street hockey with nothing more than a stick and a ball. It was the most popular game on the Indian reservation and the vast majority of those kids playing were living in incredible poverty.
I live in Phoenix now and see how expensive it is to get kids into organized hockey, but the same could be said for any organized sport. I mean some girls volleyball camps are like 1000 bucks for a week. Thats a sport that only requires a ball and a net.