One day, the Black Pen Brother came to a pencil case. He found the beautiful and generous Miss Eraser, the cold and handsome Sir Pen, and the somewhat arrogant Pencil Brother.
It seems like it's of no use to me?
That night, the little master Dongdong accidentally left his pencil case at school, and the stationery in the pencil case started chatting about it.
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Purpose: Help children find their own value
