Instruct: Classify a given review into positive or negative sentiment.
Query: Did I get a dud?

I just purchased this toy for my grandson. As I was trying it out I have found that it only goes up to 5 on the numbers, and "f" on the abc song. The music songs only play for about 5 seconds and then fades out. Is this the way this is supposed to work or did I get a dud? Please help so I know whether to send it back or not.