Can you find the grammar and meaning mistakes?

Jack wanted an ice slide from his father for Christmas. His father promised to buy his son an ice slide. But he died a short time later. But Jack still wanted an ice slide. He asked his uncle if he could buy him an ice slide. His uncle didn't like boys. Jack worked hard all summer. Jack was sitting in front of the supermarket. He saw an ice slide in the hands of his uncle. He was happy. He ran to hug his uncle. But the ice slide was not for him. His uncle bought it for his son. Jack was very sad. Because he had worked all summer. Then his cousin had an accident. His uncle deeply regretted. So he gave him the ice slide. Jack was happy.