Complex sentence: She spent most of her childhood in China where she was taught the Kigen Arts by her mother on a riverbank when she was a young kid and she told her to balance those three buckets of water and to keep her focus while balancing them.
Split into simpler sentences: She spent most of her childhood in China where, as a young girl, she was taught the Kigen Arts by her mother on a riverbank. She taught her how to balance three buckets of water and to keep her focus while balancing them.