This drawing is pointing at the valuable option of a great wall to draw on. There's a pun in the last words: "use your brains well" relates to thinking and sorting, and "use your brains' well" points at the limitless possibilities an human brain just can produce in way of thinking.
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anonymous
This drawing is pointing at the valuable option of a great wall to draw on. There's a pun in the last words: "use your brains well" relates to thinking and sorting, and "use your brains' well" points at the limitless possibilities an human brain just can produce in way of thinking.