Her eyes were bright and shining, full of curiosity.
Tips
grammar
亮亮的 is an AA的 reduplicated adjective - doubling 亮 (bright) and adding 的 softens and intensifies into a vivid, descriptive 'brightly-shiny'. Very common in Chinese to add liveliness: 红红的脸 (rosy face), 圆圆的眼睛 (round eyes), 香香的菜 (fragrant food).
