kuolong sing and piano play

One day, I heard kuokuo was singing upstairs. The song didn't sound familiar to me. I went upstairs to hear and realize that it is a song from a chinese TV series. By wathing DVD he learned the song by himself. It sounds so cute when he sings the song and he sings very very well. He sings so correctly. Also with paino learning, I play some songs sometime and they heard what I played, they then learned by themselves by trying the sound. MUM is so proud and amazed.