Idiom:

Out of the mouth of babes 孩子虽小，但说出的话的确有道理

Hit the book:
Be rooted
Folklore
Heritage
Immerse
Missionary
Exclusively
Derive from

The Haka
The origins of the haka are deeply rooted in the mists of time. It is a history rich in folklore and legend that reflects Maori heritage. New Zealand has grown up immersed in haka since first encounters between Maori and early European explorers, missionaries and settlers.