Instruct: Classify a review as either positive or negative.
Query: Authentic

It was very easy to sing along for my children and all the words in the book matched the recording. My Vietnamese friends also loved the songs. The singing voice was pleasant and clear and the music is easy to listen to. We love singing Kia con Buom Vang (Yellow Butterfly). We listen to it over and over again. Illustrations are lovely and authentic.