Involving a child into musical activities is important. So you can get the necessary training of a good singer should have. And if the times come you're now ready to sing you will not have the same case of mostly singers suffer like the pitch problem. So how to eliminate pitching problems?
You have learn to hear pitch before you ever think about of singing in pitch. You must start from hearing the pitch. If you can hear, you can move to the next step to differentiate between the sounds of different pitches.