Ginger Ninja

I was out helping my parents shift 30 years of stuff out of their roof so a trip to the home brew shop down the road was a must do. I picked up another air lock. Apparently you shouldn't fill it up too much with water. I also decided to go for a slightly different brew. I picked up a Ginger Beer kit. That's right. Non alcoholic! I had a chat with my brother about it because he had made it before. He said it turned out awful and it might be a good idea to do some internet research before trying it out. Oh dear. Tips anyone?