Find a puppet cartoon from 20+ years ago that features a black child in an old grocery store, finds a treasure map, and ends up returning home with the clothes on his back.

Synopsis from the web:

This cartoon has only one episode, like a movie. The main character is a black child, his family is very poor, people around him is very bad, his mother can not afford to buy him toys and so on, there is a legend that there is some kind of treasure in the forest and so on, and then he went to look for it, and on the way through the home of several rich people, they all laugh at him and beat him, and one of the old woman image is very ugly and scary. Then he went to the scary black forest, he didn't find any treasure, but he found his grandfather, they went home together, and on the way home they passed by those rich people's houses, they all thought that the little black kid had found the key to the treasure, so they gave the kid a lot of money and things to exchange for the key. In the end, the child and his grandfather returned home with a lot of things to live a happy life ......